MT#59962 SdpOrigin: extend constructor

To initialize `sessId` and `sessV` to 0
in case when they aren't given explicitly
during the construction
(e.g. via ther other concrete constructor).

Closes Coverity CID 642745.

Change-Id: I8abea03f079ed64a0a4127afaba61cad17473e82

core/AmSdp.h

@@ -88,7 +88,7 @@ struct SdpOrigin
   __uint128_t sessV;
   SdpConnection conn;
 
-  SdpOrigin() : user(), conn() {}
+  SdpOrigin() : user(), conn(), sessId(0), sessV(0) {}
 
   SdpOrigin(const SdpOrigin& other)
     : user(other.user), sessId(other.sessId), sessV(other.sessV),