Added a version to the X11 GL context request

This enables the application to start on Intel graphics under Mesa 10.2

libobs-opengl/gl-x11.c

@@ -39,6 +39,7 @@ static const int ctx_attribs[] = {
 	GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_DEBUG_BIT_ARB,
 #endif
 	GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
+	GLX_CONTEXT_MAJOR_VERSION_ARB, 3, GLX_CONTEXT_MINOR_VERSION_ARB, 2,
 	None,
 };