Fix some memory leaks and fallthrough errors picked up on by

Clang static code analyzer

menu/drivers/materialui.c

@@ -7095,16 +7095,24 @@ static void *materialui_init(void **userdata, bool video_is_threaded)
    unsigned width, height;
    settings_t *settings                   = config_get_ptr();
    materialui_handle_t *mui               = NULL;
-   menu_handle_t *menu                    = (menu_handle_t*)calloc(1, sizeof(*menu));
    static const char* const ticker_spacer = MUI_TICKER_SPACER;
+   menu_handle_t *menu                    = (menu_handle_t*)
+      calloc(1, sizeof(*menu));
 
-   if (!menu || !settings)
+   if (!menu)
       return NULL;
 
+   if (!settings)
+   {
+      free(menu);
+      return NULL;
+   }
+
    if (!gfx_display_init_first_driver(video_is_threaded))
       goto error;
 
-   mui = (materialui_handle_t*)calloc(1, sizeof(materialui_handle_t));
+   mui                                    = (materialui_handle_t*)
+      calloc(1, sizeof(materialui_handle_t));
 
    if (!mui)
       goto error;
@@ -7122,7 +7130,8 @@ static void *materialui_init(void **userdata, bool video_is_threaded)
 
    mui->last_width                        = width;
    mui->last_height                       = height;
-   mui->last_scale_factor        = gfx_display_get_dpi_scale(width, height);
+   mui->last_scale_factor                 = gfx_display_get_dpi_scale(
+         width, height);
    mui->dip_base_unit_size                = mui->last_scale_factor 
       * MUI_DIP_BASE_UNIT_SIZE;
 
@@ -7143,7 +7152,8 @@ static void *materialui_init(void **userdata, bool video_is_threaded)
    mui->menu_title[0]                     = '\0';
 
    /* Set initial theme colours */
-   mui->color_theme          = (enum materialui_color_theme)settings->uints.menu_materialui_color_theme;
+   mui->color_theme                       = (enum materialui_color_theme)
+      settings->uints.menu_materialui_color_theme;
    materialui_prepare_colors(mui, (enum materialui_color_theme)mui->color_theme);
 
    /* Initial ticker configuration */

menu/drivers/rgui.c

@@ -1705,7 +1705,8 @@ static bool request_thumbnail(
    return false;
 }
 
-static bool downscale_thumbnail(rgui_t *rgui, unsigned max_width, unsigned max_height,
+static bool downscale_thumbnail(rgui_t *rgui,
+      unsigned max_width, unsigned max_height,
       struct texture_image *image_src, struct texture_image *image_dst)
 {
    /* Determine output dimensions */
@@ -1827,7 +1828,11 @@ static void process_thumbnail(rgui_t *rgui, thumbnail_t *thumbnail, uint32_t *qu
    if ((image_src->width > thumbnail->max_width) || (image_src->height > thumbnail->max_height))
    {
       if (!downscale_thumbnail(rgui, thumbnail->max_width, thumbnail->max_height, image_src, &image_resampled))
+      {
+         if (image_resampled.pixels)
+            free(image_resampled.pixels);
          return;
+      }
       image = &image_resampled;
    }
    else

msg_hash.c

@@ -183,14 +183,16 @@ const char *get_user_language_iso639_1(bool limit)
          break;
       case RETRO_LANGUAGE_RUSSIAN:
          voice = "ru";
+         break;
       case RETRO_LANGUAGE_PERSIAN:
          voice = "fa";
+         break;
       case RETRO_LANGUAGE_HEBREW:
          voice = "he";
+         break;
       case RETRO_LANGUAGE_ASTURIAN:
          voice = "ast";
          break;
-
    }
    return voice;
 }

tasks/task_screenshot.c

@@ -273,7 +273,8 @@ static bool screenshot_dump(
    struct retro_system_info system_info;
    uint8_t *buf                   = NULL;
    settings_t *settings           = config_get_ptr();
-   screenshot_task_state_t *state = (screenshot_task_state_t*)calloc(1, sizeof(*state));
+   screenshot_task_state_t *state = (screenshot_task_state_t*)
+      calloc(1, sizeof(*state));
 
    state->shotname[0]             = '\0';
 
@@ -319,7 +320,10 @@ static bool screenshot_dump(
             if (path_is_empty(RARCH_PATH_CONTENT))
             {
                if (!core_get_system_info(&system_info))
+               {
+                  free(state);
                   return false;
+               }
 
                if (string_is_empty(system_info.library_name))
                   screenshot_name = "RetroArch";