fix types for builtin functions

Reference: /n/atom/patch/applied/acidbuiltinw
Date: Wed Feb 19 23:09:44 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/acid/builtin.c	Wed Feb 19 23:09:36 2014
+++ /sys/src/cmd/acid/builtin.c	Wed Feb 19 23:09:36 2014
@@ -367,7 +367,7 @@
 	for(i = 0; i < n; i++) {
 		l = al(TINT);
 		l->ival = f[i];
-		l->fmt = 'X';
+		l->fmt = 'W';
 		*tail = l;
 		tail = &l->next;
 	}
@@ -392,11 +392,11 @@
 		r->l = al(TINT);
 		l = r->l;
 		l->ival = bounds[0];
-		l->fmt = 'X';
+		l->fmt = 'W';
 		l->next = al(TINT);
 		l = l->next;
 		l->ival = bounds[1];
-		l->fmt = 'X';
+		l->fmt = 'W';
 	}
 }
 
@@ -1410,5 +1410,5 @@
 	r->op = OCONST;
 	r->type = TINT ;
 	r->ival = t->offset;
-	r->fmt = 'X';
+	r->fmt = 'W';
 }