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/testautomation_mouse.c

@@ -230,7 +230,9 @@ mouse_createFreeColorCursor(void *arg)
     /* Get sample surface */
     face = SDLTest_ImageFace();
     SDLTest_AssertCheck(face != NULL, "Validate sample input image is not NULL");
-    if (face == NULL) return TEST_ABORTED;
+    if (face == NULL) {
+        return TEST_ABORTED;
+    }
 
     /* Create a color cursor from surface */
     cursor = SDL_CreateColorCursor(face, 0, 0);
@@ -466,7 +468,9 @@ mouse_warpMouseInWindow(void *arg)
     yPositions[5] = h+1;
     /* Create test window */
     window = _createMouseSuiteTestWindow();
-    if (window == NULL) return TEST_ABORTED;
+    if (window == NULL) {
+      return TEST_ABORTED;
+    }
 
     /* Mouse to random position inside window */
     x = SDLTest_RandomIntegerInRange(1, w-1);
@@ -518,7 +522,9 @@ mouse_getMouseFocus(void *arg)
 
         /* Create test window */
     window = _createMouseSuiteTestWindow();
-    if (window == NULL) return TEST_ABORTED;
+    if (window == NULL) {
+        return TEST_ABORTED;
+    }
 
     /* Mouse to random position inside window */
     x = SDLTest_RandomIntegerInRange(1, w-1);