miPolyGlyphBlt: Delete redundant ValidateGC.

The caller is required to have validated the GC for the drawable before
calling any ops, including PolyGlyphBlt.

Signed-off-by: Jamey Sharp <jamey@minilop.net>
Reviewed-by: Keith Packard <keithp@keithp.com>

mi/miglblt.c

@@ -182,8 +182,6 @@ miPolyGlyphBlt(
 				0, 0, gWidth, gHeight, 
 				0, XYBitmap, (char *)pb);
 
-	    if ((pGC->serialNumber) != (pDrawable->serialNumber))
-		ValidateGC(pDrawable, pGC);
 	    (*pGC->ops->PushPixels)(pGC, pPixmap, pDrawable,
 			       gWidth, gHeight,
 			       x + pci->metrics.leftSideBearing,