don't write too long cache path

git-svn-id: http://svn.berlios.de/svnroot/repos/sems/trunk@1635 8eb893ce-cfd4-0310-b710-fb5ebe64c474

core/AmZRTP.cpp

@@ -89,7 +89,7 @@ void AmZRTP::freeSession(zrtp_conn_ctx_t* zrtp_session) {
 }
 
 void zrtp_get_cache_path(char *path, uint32_t length) {
-  sprintf(path, "%s", AmZRTP::cache_path.c_str());
+  snprintf(path, length, "%s", AmZRTP::cache_path.c_str());
 }