Xprint: fix handling of TrueType font name

Debian bug #272368
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=272368
In certain locales, some characters from some TrueType fonts were not
appearing in the Xprint postscript output due to the font not being
identified in the postscript output.

hw/xprint/ps/psout_ft.c

@@ -280,6 +280,8 @@ PsOut_FreeType_Text16(FontPtr pFont, PsOutPtr self, int x, int y, unsigned short
       else
       {
         sprintf(buf, "%s", baseFontName);
+        xfree(self->FontName);
+        self->FontName = NULL;
       }
 
       if( self->FontSize == -1 )