Cleanup add brace (#6545)

* Add braces after if conditions

* More add braces after if conditions

* Add braces after while() conditions

* Fix compilation because of macro being modified

* Add braces to for loop

* Add braces after if/goto

* Move comments up

* Remove extra () in the 'return ...;' statements

* More remove extra () in the 'return ...;' statements

* More remove extra () in the 'return ...;' statements after merge

* Fix inconsistent patterns are xxx == NULL vs !xxx

* More "{}" for "if() break;"  and "if() continue;"

* More "{}" after if() short statement

* More "{}" after "if () return;" statement

* More fix inconsistent patterns are xxx == NULL vs !xxx

* Revert some modificaion on SDL_RLEaccel.c

* SDL_RLEaccel: no short statement

* Cleanup 'if' where the bracket is in a new line

* Cleanup 'while' where the bracket is in a new line

* Cleanup 'for' where the bracket is in a new line

* Cleanup 'else' where the bracket is in a new line

Xcode-iOS/Demos/src/keyboard.c

@@ -165,7 +165,7 @@ loadFont(void)
 {
     SDL_Surface *surface = SDL_LoadBMP("kromasky_16x16.bmp");
 
-    if (!surface) {
+    if (surface == NULL) {
         printf("Error loading bitmap: %s\n", SDL_GetError());
         return 0;
     } else {
@@ -183,7 +183,7 @@ loadFont(void)
         SDL_BlitSurface(surface, NULL, converted, NULL);
         /* create our texture */
         texture = SDL_CreateTextureFromSurface(renderer, converted);
-        if (!texture) {
+        if (texture == NULL) {
             printf("texture creation failed: %s\n", SDL_GetError());
         } else {
             /* set blend mode for our texture */