fax_force_caller variable rework

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@9469 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_fax/mod_fax.c

@@ -456,7 +456,13 @@ void process_fax(switch_core_session_t *session, const char *data, application_m
 		pvt->verbose = globals.verbose;
 	}
 
-    pvt->caller = switch_true(switch_channel_get_variable(channel, "fax_force_caller"));
+	if ( (tmp=switch_channel_get_variable(channel, "fax_force_caller")) ) {
+		if ( switch_true(tmp) ) {
+			pvt->caller = 1;
+		} else {
+			pvt->caller = 0;
+		}
+	}
 
 	if ((tmp = switch_channel_get_variable(channel, "fax_ident"))) {
 		pvt->ident = switch_core_session_strdup(session, tmp);