handle allocation error. Found by Klockwork (www.klocwork.com)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8484 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_dptools/mod_dptools.c

@@ -1687,7 +1687,10 @@ SWITCH_STANDARD_APP(record_session_function)
 	}
 
 	path = switch_core_session_strdup(session, data);
-	if (path && (p = strchr(path, '+'))) {
+
+	if (!path) return;
+
+	if ((p = strchr(path, '+'))) {
 		char *q = p - 1;
 		while(q && *q == ' ') {
 			*q = '\0';