added estack.str, minor fix

lang/cem/cemcom/estack.str

@@ -0,0 +1,21 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
+/* $Header$ */
+/* EXPRESSION STACK */
+/* Used for global initializations */
+struct e_stack {
+	struct e_stack	*next;
+	arith		s_cnt1, s_cnt2;
+	struct sdef 	*s_def;
+	struct type 	**s_tpp;
+	char 		s_nested;
+};
+
+/* ALLOCDEF "e_stack" 5 */
+
+#define bytes_upto_here	s_cnt1
+#define last_offset	s_cnt2
+#define elem_count	s_cnt1
+#define nelem		s_cnt2