ash: Use setvar2 some more

(add/remove: 0/0 grow/shrink: 10/15 up/down: 13/-27)          Total: -14 bytes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
diff --git a/shell/ash.c b/shell/ash.c
index d696bbd..f9b4d3f 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -2286,7 +2286,7 @@
 			free(vp);
 			INT_ON;
 		} else {
-			setvar(s, 0, 0);
+			setvar2(s, 0);
 			vp->flags &= ~VEXPORT;
 		}
  ok:
@@ -6339,7 +6339,7 @@
 
 	switch (subtype) {
 	case VSASSIGN:
-		setvar(varname, startp, 0);
+		setvar2(varname, startp);
 		amount = startp - expdest;
 		STADJUST(amount, expdest);
 		return startp;
@@ -8554,7 +8554,7 @@
 	loopnest++;
 	flags &= EV_TESTED;
 	for (sp = arglist.list; sp; sp = sp->next) {
-		setvar(n->nfor.var, sp->text, 0);
+		setvar2(n->nfor.var, sp->text);
 		evaltree(n->nfor.body, flags);
 		if (evalskip) {
 			if (evalskip == SKIPCONT && --skipcount <= 0) {
@@ -9451,7 +9451,7 @@
 		 * '_' in 'vi' command mode during line editing...
 		 * However I implemented that within libedit itself.
 		 */
-		setvar("_", lastarg, 0);
+		setvar2("_", lastarg);
 	}
 	popstackmark(&smark);
 }
@@ -12273,7 +12273,6 @@
 	 * bash returns exitcode 1 instead.
 	 */
 	fullname = find_dot_file(argv[1]);
-
 	argv += 2;
 	argc -= 2;
 	if (argc) { /* argc > 0, argv[0] != NULL */
@@ -13012,7 +13011,7 @@
 			}
 		}
 
-		setvar("PPID", utoa(getppid()), 0);
+		setvar2("PPID", utoa(getppid()));
 
 		p = lookupvar("PWD");
 		if (p) {
@@ -13267,7 +13266,7 @@
 				hp = lookupvar("HOME");
 				if (hp) {
 					hp = concat_path_file(hp, ".ash_history");
-					setvar("HISTFILE", hp, 0);
+					setvar2("HISTFILE", hp);
 					free((char*)hp);
 					hp = lookupvar("HISTFILE");
 				}