(Fgarbage_collect): Prevent compiler warning for a call

to `mark_object'.

src/ChangeLog

+2000-10-03  Eli Zaretskii  <eliz@is.elta.co.il>
+
+	* alloc.c (Fgarbage_collect): Prevent compiler warning for a call
+	to `mark_object'.
+
 2000-10-02  Stefan Monnier  <monnier@cs.yale.edu>
 
 	* syntax.c (forw_comment): Match nestedness of ender/starter.

src/alloc.c

@@ -3600,7 +3600,9 @@ Garbage collection happens automatically if you cons more than\n\
     for (i = 0; i < tail->nvars; i++)
       if (!XMARKBIT (tail->var[i]))
 	{
-	  mark_object (&tail->var[i]);
+	  /* Explicit casting prevents compiler warning about
+	     discarding the `volatile' qualifier.  */
+	  mark_object ((Lisp_Object *)&tail->var[i]);
 	  XMARK (tail->var[i]);
 	}
 #endif