(der_parse_hex_heim_integer): check length before reading data.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@20840 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/asn1/der_format.c

@@ -74,7 +74,7 @@ der_parse_hex_heim_integer (const char *p, heim_integer *data)
 
     {
 	unsigned char *q = data->data;
-	while(*q == 0 && len > 0) {
+	while(len > 0 && *q == 0) {
 	    q++;
 	    len--;
 	}