Move assertion and add another restriction, used as hint to beam that its ok

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@17211 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/des/des.c

@@ -513,9 +513,10 @@ DES_cfb64_encrypt(const void *in, void *out,
 
     load(*iv, uiv);
 
+    assert(*num >= 0 && *num < DES_CBLOCK_LEN);
+
     if (forward_encrypt) {
 	int i = *num;
-	assert(i >= 0);
 
 	while (length > 0) {
 	    if (i == 0)
@@ -537,7 +538,6 @@ DES_cfb64_encrypt(const void *in, void *out,
     } else {
 	int i = *num;
 	unsigned char c;
-	assert(i >= 0);
 
 	while (length > 0) {
 	    if (i == 0) {