Bindings should have a trailing comma, so the CRC can be appended

src/joystick/SDL_gamecontroller.c

@@ -1330,7 +1330,7 @@ static ControllerMapping_t *SDL_PrivateGetControllerMappingForNameAndGUID(const
             /* The Linux driver xpad.c maps the wireless dpad to buttons */
             SDL_bool existing;
             mapping = SDL_PrivateAddMappingForGUID(guid,
-"none,X360 Wireless Controller,a:b0,b:b1,back:b6,dpdown:b14,dpleft:b11,dpright:b12,dpup:b13,guide:b8,leftshoulder:b4,leftstick:b9,lefttrigger:a2,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b10,righttrigger:a5,rightx:a3,righty:a4,start:b7,x:b2,y:b3",
+"none,X360 Wireless Controller,a:b0,b:b1,back:b6,dpdown:b14,dpleft:b11,dpright:b12,dpup:b13,guide:b8,leftshoulder:b4,leftstick:b9,lefttrigger:a2,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b10,righttrigger:a5,rightx:a3,righty:a4,start:b7,x:b2,y:b3,",
                           &existing, SDL_CONTROLLER_MAPPING_PRIORITY_DEFAULT);
         } else if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box") || SDL_strstr(name, "XBOX")) {
             mapping = s_pXInputMapping;
@@ -1420,16 +1420,6 @@ static ControllerMapping_t *SDL_PrivateGenerateAutomaticControllerMapping(const
     SDL_PrivateAppendToMappingString(mapping, sizeof(mapping), "lefttrigger", &raw_map->lefttrigger);
     SDL_PrivateAppendToMappingString(mapping, sizeof(mapping), "righttrigger", &raw_map->righttrigger);
 
-    /* Remove trailing comma */
-    {
-        int pos = (int)SDL_strlen(mapping) - 1;
-        if (pos >= 0) {
-            if (mapping[pos] == ',') {
-                mapping[pos] = '\0';
-            }
-        }
-    }
-
     return SDL_PrivateAddMappingForGUID(guid, mapping,
                       &existing, SDL_CONTROLLER_MAPPING_PRIORITY_DEFAULT);
 }