Add GLXFBConfig on Wine_GLContext (we should remove XVisualInfo
references on code).
Hook glGetIntegerv on GL_ALPHA_BITS to query on GLXFBConfig instead of
glGetInteger (as it returns bad value).

diff --git a/dlls/opengl32/opengl_norm.c b/dlls/opengl32/opengl_norm.c
index 0870575..8374a86 100644
--- a/dlls/opengl32/opengl_norm.c
+++ b/dlls/opengl32/opengl_norm.c
@@ -1329,7 +1329,7 @@
 void WINAPI wine_glGetIntegerv( GLenum pname, GLint* params ) {
   TRACE("(%d, %p)\n", pname, params );
   ENTER_GL();
-  glGetIntegerv( pname, params );
+  internal_glGetIntegerv( pname, params );
   LEAVE_GL();
 }