font: Fix a small resource leak in a failure case in rfbLoadConsoleFont()

The file handle wouldn't be closed in this instance.

libvncserver/font.c

@@ -174,6 +174,7 @@ rfbFontDataPtr rfbLoadConsoleFont(char *filename)
   if(1!=fread(p->data,4096,1,f)) {
     free(p->data);
     free(p);
+    fclose(f);
     return NULL;
   }
   fclose(f);