use 'U' suffix on constants instead of (unsigned int) cast.

src/core/android/SDL_android.c

@@ -2400,7 +2400,7 @@ int Android_JNI_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *bu
     if (messageboxdata->colorScheme) {
         colors = (*env)->NewIntArray(env, SDL_MESSAGEBOX_COLOR_MAX);
         for (i = 0; i < SDL_MESSAGEBOX_COLOR_MAX; ++i) {
-            temp = ((unsigned int)0xFF << 24) |
+            temp = (0xFFU << 24) |
                    (messageboxdata->colorScheme->colors[i].r << 16) |
                    (messageboxdata->colorScheme->colors[i].g << 8) |
                    (messageboxdata->colorScheme->colors[i].b << 0);

src/joystick/controller_type.h

@@ -61,7 +61,7 @@ typedef enum
 	k_eControllertype_GenericMouse = 800,
 } EControllerType;
 
-#define MAKE_CONTROLLER_ID( nVID, nPID )	(unsigned int)( (unsigned int)nVID << 16 | nPID )
+#define MAKE_CONTROLLER_ID( nVID, nPID )	(unsigned int)( (unsigned int)nVID << 16 | (unsigned int)nPID )
 typedef struct
 {
 	unsigned int m_unDeviceID;

src/video/SDL_RLEaccel.c

@@ -295,10 +295,10 @@
     } while(0)
 
 #define ALPHA_BLIT16_565_50(to, from, length, bpp, alpha)       \
-    ALPHA_BLIT16_50(to, from, length, bpp, alpha, (unsigned int)0xf7de)
+    ALPHA_BLIT16_50(to, from, length, bpp, alpha, 0xf7deU)
 
 #define ALPHA_BLIT16_555_50(to, from, length, bpp, alpha)       \
-    ALPHA_BLIT16_50(to, from, length, bpp, alpha, (unsigned int)0xfbde)
+    ALPHA_BLIT16_50(to, from, length, bpp, alpha, 0xfbdeU)
 
 #define CHOOSE_BLIT(blitter, alpha, fmt)                        \
     do {                                                        \