Hacky fix for pline recursion outputting raw_print

When glyph updates are on, pline can be called recursively
when the vision is being fully recalculated.  This caused
the recursively called pline to output raw_pline text.

Not sure if this is the correct way to fix it, but can't really
turn off or block the glyph update notices either ...

src/pline.c

@@ -257,8 +257,13 @@ vpline(const char *line, va_list the_args)
             goto pline_done;
     }
 
-    if (gv.vision_full_recalc)
+    if (gv.vision_full_recalc) {
+        int tmp_in_pline = in_pline;
+
+        in_pline = 0;
         vision_recalc(0);
+        in_pline = tmp_in_pline;
+    }
     if (u.ux)
         flush_screen((gp.pline_flags & NO_CURS_ON_U) ? 0 : 1); /* %% */