hello_xr: Disable USE_MIRROR_WINDOW for Vulkan version default

Signed-off-by: utzcoz <[email protected]>

Author: utzcoz

src/tests/hello_xr/graphicsplugin_vulkan.cpp

@@ -17,8 +17,9 @@
 #endif
 
 #if defined(VK_USE_PLATFORM_WIN32_KHR)
-// Define USE_MIRROR_WINDOW to open a otherwise-unused window for e.g. RenderDoc
-#define USE_MIRROR_WINDOW
+// Define USE_MIRROR_WINDOW to open a otherwise-unused window for e.g. RenderDoc.
+// We need to disable it default to avoid disruption for normal usage.
+#undef USE_MIRROR_WINDOW
 #endif
 
 // glslangValidator doesn't wrap its output in brackets if you don't have it define the whole array.