tests: Fix unreachable code warnings (#14993)

src/gpu/xr/SDL_gpu_openxr.c

@@ -55,7 +55,7 @@ static bool SDL_OPENXR_INTERNAL_ValidationLayerAvailable(void)
     /* On Android/Quest, the xrGetInstanceProcAddr obtained through runtime negotiation
      * crashes when used for pre-instance global functions. Skip validation layer check. */
     return false;
-#endif
+#else
 
     Uint32 apiLayerCount;
     if (XR_FAILED(xrEnumerateApiLayerProperties(0, &apiLayerCount, NULL))) {
@@ -84,6 +84,7 @@ static bool SDL_OPENXR_INTERNAL_ValidationLayerAvailable(void)
 
     SDL_stack_free(apiLayerProperties);
     return found;
+#endif
 }
 
 XrResult SDL_OPENXR_INTERNAL_GPUInitOpenXR(

src/render/direct3d12/SDL_render_d3d12.c

@@ -2795,7 +2795,6 @@ static bool D3D12_SetDrawState(SDL_Renderer *renderer, const SDL_RenderCommand *
                 break;
             default:
                 return SDL_SetError("[direct3d12] Trying to set a sampler for a shader which doesn't have one");
-                break;
             }
 
             ID3D12GraphicsCommandList2_SetGraphicsRootDescriptorTable(rendererData->commandList, tableIndex, GPUHandle);

src/video/windows/SDL_windowsevents.c

@@ -2230,7 +2230,7 @@ LRESULT CALLBACK WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPara
         SDL_SendDropComplete(data->window);
         DragFinish(drop);
         return 0;
-    } break;
+    }
 
     case WM_DISPLAYCHANGE:
     {
@@ -2462,7 +2462,6 @@ LRESULT CALLBACK WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPara
             data->expected_resize = false;
             return 0;
         }
-        break;
 
     case WM_SETTINGCHANGE:
         if (wParam == 0 && lParam != 0 && SDL_wcscmp((wchar_t *)lParam, L"ImmersiveColorSet") == 0) {