SDL_JoystickInit: If malloc() fails, pretend no joysticks were detected.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40717

src/joystick/SDL_joystick.c

@@ -63,8 +63,8 @@ int SDL_JoystickInit(void)
 			SDL_numjoysticks = 0;
 		} else {
 			memset(SDL_joysticks, 0, arraylen);
+			SDL_numjoysticks = status;
 		}
-		SDL_numjoysticks = status;
 		status = 0;
 	}
 	default_joystick = NULL;