Added AvgCharWidth member to font metrics.

dlls/wineps/psdrv.h

diff --git a/dlls/wineps/psdrv.h b/dlls/wineps/psdrv.h
index 75903d4..cf7cb9f 100644
--- a/dlls/wineps/psdrv.h
+++ b/dlls/wineps/psdrv.h
@@ -57,6 +57,7 @@
     SHORT   	    	sAscender;  	    	/* hhea:Ascender */
     SHORT   	    	sDescender; 	    	/* hhea:Descender */
     SHORT   	    	sLineGap;   	    	/* hhea:LineGap */
+    SHORT   	    	sAvgCharWidth;	    	/* OS/2:xAvgCharWidth */
     SHORT   	    	sTypoAscender;	    	/* OS/2:sTypoAscender */
     SHORT   	    	sTypoDescender;     	/* OS/2:sTypoDescender */
     SHORT   	    	sTypoLineGap;	    	/* OS/2:sTypeLineGap */