message: GL backend: fixed issue in 16-bit texture format support detection
diff: @@ -897,12 +897,12 @@ void RenderDeviceGLImpl::InitAdapterInfo()
  void RenderDeviceGLImpl::FlagSupportedTexFormats()
  {
  const auto& DeviceInfo = GetDeviceInfo();
  - bool bGL33OrAbove = DeviceInfo.Type == RENDER_DEVICE_TYPE_GL && DeviceInfo.APIVersion >= Version{4, 3};
  + const auto bGL33OrAbove = DeviceInfo.Type == RENDER_DEVICE_TYPE_GL && DeviceInfo.APIVersion >= Version{3, 3};
  - bool bRGTC = CheckExtension("GL_ARB_texture_compression_rgtc");
  - bool bBPTC = CheckExtension("GL_ARB_texture_compression_bptc");
  - bool bS3TC = CheckExtension("GL_EXT_texture_compression_s3tc");
  - bool bTexNorm16 = CheckExtension("GL_EXT_texture_norm16"); // Only for ES3.1+
  + const bool bRGTC = CheckExtension("GL_ARB_texture_compression_rgtc");
  + const bool bBPTC = CheckExtension("GL_ARB_texture_compression_bptc");
  + const bool bS3TC = CheckExtension("GL_EXT_texture_compression_s3tc");
  + const bool bTexNorm16 = CheckExtension("GL_EXT_texture_norm16"); // Only for ES3.1+
  #define FLAG_FORMAT(Fmt, IsSupported) \
  m_TextureFormatsInfo[Fmt].Supported = IsSupported
  