Misc (ticket #838):

- protect pj_strdup() for case when source and destination string are the same pointer. Without this, destination string will contain garbage value.


git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2749 74dad513-b988-da41-8d7b-12977e46ad98

pjlib/include/pj/string_i.h

@@ -32,6 +32,10 @@ PJ_IDEF(pj_str_t*) pj_strdup(pj_pool_t *pool,
 			      pj_str_t *dst,
 			      const pj_str_t *src)
 {
+    /* Without this, destination will be corrupted */
+    if (dst == src)
+	return dst;
+
     if (src->slen) {
 	dst->ptr = (char*)pj_pool_alloc(pool, src->slen);
 	pj_memcpy(dst->ptr, src->ptr, src->slen);