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

(cherry picked from commit 6a2200823c to reduce conflicts merging between SDL2 and SDL3)

test/testsprite2.c

@@ -73,17 +73,17 @@ LoadSprite(const char *file)
         /* This does the SDL_LoadBMP step repeatedly, but that's OK for test code. */
         sprites[i] = LoadTexture(state->renderers[i], file, SDL_TRUE, &sprite_w, &sprite_h);
         if (!sprites[i]) {
-            return (-1);
+            return -1;
         }
         if (SDL_SetTextureBlendMode(sprites[i], blendMode) < 0) {
             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set blend mode: %s\n", SDL_GetError());
             SDL_DestroyTexture(sprites[i]);
-            return (-1);
+            return -1;
         }
     }
 
     /* We're ready to roll. :) */
-    return (0);
+    return 0;
 }
 
 void
@@ -407,8 +407,9 @@ loop()
         SDLTest_CommonEvent(state, &event, &done);
     }
     for (i = 0; i < state->num_windows; ++i) {
-        if (state->windows[i] == NULL)
+        if (state->windows[i] == NULL) {
             continue;
+        }
         MoveSprites(state->renderers[i], sprites[i]);
     }
 #ifdef __EMSCRIPTEN__
@@ -442,7 +443,7 @@ main(int argc, char *argv[])
 
     /* Initialize test framework */
     state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
-    if (!state) {
+    if (state == NULL) {
         return 1;
     }
 
@@ -474,7 +475,9 @@ main(int argc, char *argv[])
             } else if (SDL_strcasecmp(argv[i], "--iterations") == 0) {
                 if (argv[i + 1]) {
                     iterations = SDL_atoi(argv[i + 1]);
-                    if (iterations < -1) iterations = -1;
+                    if (iterations < -1) {
+                        iterations = -1;
+                    }
                     consumed = 2;
                 }
             } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
@@ -527,7 +530,7 @@ main(int argc, char *argv[])
     /* Create the windows, initialize the renderers, and load the textures */
     sprites =
         (SDL_Texture **) SDL_malloc(state->num_windows * sizeof(*sprites));
-    if (!sprites) {
+    if (sprites == NULL) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
         quit(2);
     }
@@ -543,7 +546,7 @@ main(int argc, char *argv[])
     /* Allocate memory for the sprite info */
     positions = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
     velocities = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
-    if (!positions || !velocities) {
+    if (positions == NULL || velocities == NULL) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
         quit(2);
     }