buildfixes

gfx/display_servers/dispserv_null.c

@@ -15,6 +15,7 @@
  *  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stddef.h>
 #include "../video_display_server.h"
 
 static void* null_display_server_init()

gfx/display_servers/dispserv_win32.c

@@ -26,7 +26,7 @@ typedef struct
 
 static void* win32_display_server_init()
 {
-   dispserv_win32_t *dispserv = calloc(1, sizeof(*dispserv));
+   dispserv_win32_t *dispserv = (dispserv_win32_t*)calloc(1, sizeof(*dispserv));
 
    return dispserv;
 }