Don't generate BGRA8 internal format for DX interop textures in GL

* Proper GL doesn't seem to support this internal format, and fortunately the
  contents save/load work fine with GL's built-in swizzling if we treat the
  texture as RGBA8 instead.

renderdoc/driver/gl/wrappers/gl_interop_funcs.cpp

@@ -269,6 +269,9 @@ bool WrappedOpenGL::Serialise_wglDXRegisterObjectNV(SerialiserType &ser, GLResou
     GetDXTextureProperties(dxObject, format, width, height, depth, mips, layers, samples);
     if(type != eGL_NONE)
       internalFormat = MakeGLFormat(format);
+    // desktop GL doesn't support BGRA8 as an internal format for some reason
+    if(internalFormat == eGL_BGRA8_EXT)
+      internalFormat = eGL_RGBA8;
 #else
     RDCERR("Should never happen - cannot serialise wglDXRegisterObjectNV, interop is disabled");
 #endif