- fix: doing strlen(bodybuff) after having free()d it

found by dmalloc memory poisoning
- fix: new branch id hash calculation was not working properly
  (dont check return status in osip_xxx_to_str() functions -
  the docu does not say anything about them (looks like 0 == success)
  but better check the returnet string pointer value -> NULL = failed)
  This resulted in a memory leak an imporper calculated MD5 hash.

src/proxy.c

@@ -710,7 +710,6 @@ if (configuration.debuglevel)
 
    /* include new body */
    osip_message_set_body(mymsg, bodybuff);
-   osip_free(bodybuff);
 
    /* free content length resource and include new one*/
    osip_content_length_free(mymsg->content_length);
@@ -718,6 +717,9 @@ if (configuration.debuglevel)
    sprintf(clen,"%i",strlen(bodybuff));
    sts = osip_message_set_content_length(mymsg, clen);
 
+   /* free old body */
+   osip_free(bodybuff);
+
 if (configuration.debuglevel)
 { /* just dump the buffer */
    char *tmp, *tmp2;