mainly new comments

lang/m2/libm2/StrAss.c

@@ -1,3 +1,14 @@
+/*
+  (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
+  See the copyright notice in the ACK home directory, in the file "Copyright".
+*/
+
+/*
+  Module:	assign string to character array, with possible 0-byte
+		extension
+  Author:	Ceriel J.H. Jacobs
+  Version:	$Header$
+*/
 _StringAssign(dstsiz, srcsiz, dstaddr, srcaddr)
 	register char *dstaddr, *srcaddr;
 {
@@ -6,8 +17,7 @@ _StringAssign(dstsiz, srcsiz, dstaddr, srcaddr)
 		srcsiz--;
 		dstsiz--;
 	}
-	while (dstsiz > 0) {
-		*dstaddr++ = 0;
-		dstsiz--;
+	if (dstsiz > 0) {
+		*dstaddr = 0;
 	}
 }