Added patterned brushes (level 2 PostScript only).
Simple PatBlt for PATCOPY, WHITENESS and BLACKNESS.

diff --git a/graphics/psdrv/init.c b/graphics/psdrv/init.c
index 226327e..3295f62 100644
--- a/graphics/psdrv/init.c
+++ b/graphics/psdrv/init.c
@@ -58,7 +58,7 @@
     NULL,                            /* pOffsetViewportOrg (optional) */
     NULL,                            /* pOffsetWindowOrg (optional) */
     NULL,                            /* pPaintRgn */
-    NULL,                            /* pPatBlt */
+    PSDRV_PatBlt,                    /* pPatBlt */
     PSDRV_Pie,                       /* pPie */
     PSDRV_PolyPolygon,               /* pPolyPolygon */
     PSDRV_PolyPolyline,              /* pPolyPolyline */