Ports: Interframe blending menu option

src/feature/gui/gui-config.c

@@ -108,6 +108,16 @@ void mGUIShowConfig(struct mGUIRunner* runner, struct GUIMenuItem* extra, size_t
 		.title = "Select SGB BIOS path",
 		.data = "sgb.bios",
 	};
+	*GUIMenuItemListAppend(&menu.items) = (struct GUIMenuItem) {
+		.title = "Interframe blending",
+		.data = "interframeBlending",
+		.submenu = 0,
+		.state = false,
+		.validStates = (const char*[]) {
+			"Off", "On"
+		},
+		.nStates = 2
+	};
 	*GUIMenuItemListAppend(&menu.items) = (struct GUIMenuItem) {
 		.title = "Enable SGB borders",
 		.data = "sgb.borders",

src/platform/psp2/psp2-context.c

@@ -394,8 +394,9 @@ void mPSP2LoadROM(struct mGUIRunner* runner) {
 	}
 
 	int fakeBool;
-	mCoreConfigGetIntValue(&runner->config, "interframeBlending", &fakeBool);
-	interframeBlending = fakeBool;
+	if (mCoreConfigGetIntValue(&runner->config, "interframeBlending", &fakeBool)) {
+		interframeBlending = fakeBool;
+	}
 
 	MutexInit(&audioContext.mutex);
 	ConditionInit(&audioContext.cond);

src/platform/switch/main.c

@@ -289,8 +289,9 @@ static void _gameLoaded(struct mGUIRunner* runner) {
 	}
 
 	int fakeBool;
-	mCoreConfigGetIntValue(&runner->config, "interframeBlending", &fakeBool);
-	interframeBlending = fakeBool;
+	if (mCoreConfigGetIntValue(&runner->config, "interframeBlending", &fakeBool)) {
+		interframeBlending = fakeBool;
+	}
 
 	rumble.up = 0;
 	rumble.down = 0;

src/platform/wii/main.c

@@ -859,8 +859,9 @@ void _unpaused(struct mGUIRunner* runner) {
 		}
 	}
 	int fakeBool;
-	mCoreConfigGetIntValue(&runner->config, "interframeBlending", &fakeBool);
-	interframeBlending = fakeBool;
+	if (mCoreConfigGetIntValue(&runner->config, "interframeBlending", &fakeBool)) {
+		interframeBlending = fakeBool;
+	}
 
 	float stretch;
 	if (mCoreConfigGetFloatValue(&runner->config, "stretchWidth", &stretch)) {