Add missing break

(cherry picked from commit 0500fca00c141cc4ab9be15ce5ddb7bc8c5c17b2)

src/joystick/SDL_gamecontroller.c

@@ -586,6 +586,7 @@ static ControllerMapping_t *SDL_CreateMappingForHIDAPIController(SDL_JoystickGUI
         switch (guid.data[15]) {
         case k_eSwitchDeviceInfoControllerType_HVCLeft:
             SDL_strlcat(mapping_string, "a:b0,b:b1,back:b4,dpdown:b12,dpleft:b13,dpright:b14,dpup:b11,leftshoulder:b9,rightshoulder:b10,start:b6,", sizeof(mapping_string));
+            break;
         case k_eSwitchDeviceInfoControllerType_HVCRight:
             SDL_strlcat(mapping_string, "a:b0,b:b1,dpdown:b12,dpleft:b13,dpright:b14,dpup:b11,leftshoulder:b9,rightshoulder:b10,", sizeof(mapping_string));
             break;