forsyth: fix newvlongcode in bcomplex. this only currently applies to qc

Reference: /n/atom/patch/applied/ccbcomplexfix
Date: Sun Aug 16 01:23:41 CES 2015
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/cc/pgen.c	Sun Aug 16 01:23:32 2015
+++ /sys/src/cmd/cc/pgen.c	Sun Aug 16 01:23:34 2015
@@ -573,8 +573,8 @@
 	}
 	if(c != Z && n->op == OCONST && deadheads(c))
 		return 1;
-	/* this is not quite right yet, so ignore it for now */
-	if(0 && newvlongcode && typev[n->type->etype] && machcap(Z)) {
+	if(newvlongcode && typev[n->type->etype] && machcap(Z)) {
+		nod = znode;
 		b = &nod;
 		b->op = ONE;
 		b->left = n;
@@ -582,7 +582,8 @@
 		*b->right = *nodconst(0);
 		b->right->type = n->type;
 		b->type = types[TLONG];
-		cgen(b, Z);
+		xcom(b);
+		boolgen(b, 1, Z);
 		return 0;
 	}
 	bool64(n);