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[cc1] Change name of variable in typesize()

The scope of the variable was to big to use aux for it,
and it was hard to follow the code because it was not
clear was 'aux' meant.

--- a/cc1/types.c

+++ b/cc1/types.c

@@ -173,7 +173,7 @@

 typesize(Type *tp)

 {

 	Symbol **sp;

-	Type *aux;

+	Type *type;

 	unsigned long size, offset;

 	int align, a;

 	TINT n;

@@ -202,18 +202,18 @@

 		n = tp->n.elem;

 		for (sp = tp->p.fields; n--; ++sp) {

 			(*sp)->u.i = offset;

-			aux = (*sp)->type;

-			a = aux->align;

+			type = (*sp)->type;

+			a = type->align;

 			if (a > align)

 				align = a;

 			if (tp->op == STRUCT) {

 				if (--a != 0)

 					size = (size + a) & ~a;

-				size += aux->size;

+				size += type->size;

 				offset = size;

 			} else {

-				if (aux->size > size)

-					size = aux->size;

+				if (type->size > size)

+					size = type->size;

 			}

 		}