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/testdrawchessboard.c

@@ -37,11 +37,11 @@ DrawChessBoard()
     /* Get the Size of drawing surface */
     SDL_RenderGetViewport(renderer, &darea);
 
-    for( ; row < 8; row++)
+    for ( ; row < 8; row++)
     {
         column = row%2;
         x = column;
-        for( ; column < 4+(row%2); column++)
+        for ( ; column < 4+(row%2); column++)
         {
             SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0xFF);
 
@@ -104,8 +104,7 @@ main(int argc, char *argv[])
     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
 
     /* Initialize SDL */
-    if(SDL_Init(SDL_INIT_VIDEO) != 0)
-    {
+    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init fail : %s\n", SDL_GetError());
         return 1;
     }
@@ -113,15 +112,13 @@ main(int argc, char *argv[])
 
     /* Create window and renderer for given surface */
     window = SDL_CreateWindow("Chess Board", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_RESIZABLE);
-    if(!window)
-    {
+    if (window == NULL) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Window creation fail : %s\n",SDL_GetError());
         return 1;
     }
     surface = SDL_GetWindowSurface(window);
     renderer = SDL_CreateSoftwareRenderer(surface);
-    if(!renderer)
-    {
+    if (renderer == NULL) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Render creation for surface fail : %s\n",SDL_GetError());
         return 1;
     }