Fixed testalpha screen clear for screen formats with an alpha channel

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403267

test/testalpha.c

@@ -65,8 +65,7 @@ FillBackground(SDL_Surface * screen)
             Uint32 color;
 
             gradient = ((i * 255) / screen->h);
-                color = SDL_MapRGB(screen->format,
-                                   gradient, gradient, gradient);
+            color = SDL_MapRGB(screen->format, gradient, gradient, gradient);
             buffer32 = (Uint32 *) buffer;
             for (k = 0; k < screen->w; k++) {
                 *buffer32++ = color;
@@ -523,7 +522,8 @@ main(int argc, char *argv[])
                     area.y = event.button.y - 16;
                     area.w = 32;
                     area.h = 32;
-                    SDL_FillRect(screen, &area, SDL_MapRGB(screen->format, 0, 0, 0));
+                    SDL_FillRect(screen, &area,
+                                 SDL_MapRGB(screen->format, 0, 0, 0));
                     SDL_UpdateRects(screen, 1, &area);
                 }
                 break;