virglrenderer: Dirty exits when using glvnd
Steps to reproduce
Observe the following errors in virgl_test_server
➜ virgl_test_server --use-glx
gl_version 46 - core profile enabled
Mesa: User error: GL_INVALID_VALUE in glTexImage2D(internalFormat=GL_ALPHA8)
Mesa: User error: GL_INVALID_VALUE in glTexImage2D(internalFormat=GL_ALPHA16)
vtest_client_dispatch_commands: client context created.
GLSL feature level 460
GLSL feature level 460
client failed: VTEST_CLIENT_ERROR_INPUT_READ
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 152 (GLX)
Minor opcode of failed request: 26 (X_GLXMakeContextCurrent)
Serial number of failed request: 55
Current serial number in output stream: 55