some array init bugs

renamed 6g/(gen|align|obj).c

R=r
OCL=29205
CL=29205

src/cmd/6g/Makefile

@@ -15,9 +15,9 @@ HFILES=\
 
 OFILES=\
 	list.$O\
-	obj.$O\
-	align.$O\
-	gen.$O\
+	gobj.$O\
+	galign.$O\
+	ggen.$O\
 	cgen.$O\
 	gsubr.$O\
 	peep.$O\

src/cmd/gc/walk.c

@@ -3970,9 +3970,11 @@ structlit(Node *n, Node *var)
 	r = listfirst(&saver, &n->left);
 	if(r != N && r->op == OEMPTY)
 		r = N;
+	if(r == N)
+		return var;
 
 	mixflag = 0;
-	if(r != N && r->op == OKEY) {
+	if(r->op == OKEY) {
 		a = nod(OAS, var, N);
 		addtop = list(addtop, a);
 		goto loop2;
@@ -4050,11 +4052,11 @@ arraylit(Node *n, Node *var)
 		r = N;
 
 	while(r != N) {
-		b++;
 		if(r->op == OKEY) {
 			evconst(r->left);
 			b = nonnegconst(r->left);
 		}
+		b++;
 		if(b > ninit)
 			ninit = b;
 		r = listnext(&saver);
@@ -4064,6 +4066,7 @@ arraylit(Node *n, Node *var)
 	if(b == -100) {
 		// flag for [...]
 		b = ninit;
+		if(var == N)
 			t = shallow(t);
 		t->bound = b;
 	}