Print a message if the PostScript driver can't find a PPD file.

diff --git a/graphics/psdrv/init.c b/graphics/psdrv/init.c
index 6e42e9b..c425726 100644
--- a/graphics/psdrv/init.c
+++ b/graphics/psdrv/init.c
@@ -340,6 +340,8 @@
         HeapFree(PSDRV_Heap, 0, pi->Devmode);
         HeapFree(PSDRV_Heap, 0, pi);
 	*last = NULL;
+	MSG("Couldn't find PPD file '%s', expect a crash now!\n",
+	    pi->Devmode->dmDrvPrivate.ppdFileName);
 	return NULL;
     }