MT#57437 Upstream: fixed parsing of sip uri

Backport from the upstream to fix parsing of sip uri,
when display name contains uri scheme characters:
's', 'i', 'p', and ':'

Upstream commit: fe760b5afdb455707ad2ed3ada7f7fbda6b2fd0e

Change-Id: Idf0236ae9ef2be958693d589894d52ea1ed70848

core/AmUriParser.cpp

@@ -180,7 +180,7 @@ enum {
  */
 bool AmUriParser::parse_uri() {
   // assuming user@host
-  size_t pos = 0; int st = uS0;
+  size_t pos; int st = uS0;
   size_t p1 = 0; 
   int eq = 0; const char* sip_prot = "SIP:";
   uri_user = ""; uri_host = ""; uri_port = ""; uri_param = "";
@@ -188,6 +188,8 @@ bool AmUriParser::parse_uri() {
   if (uri.empty())
     return false;
 
+  pos = skip_name(uri, 0);
+
   while (pos<uri.length()) {
     char c = uri[pos];
     //    DBG("(1) c = %c, st = %d\n", c, st);