fix windows trivial compiler warnings

src/mod/applications/mod_dptools/mod_dptools.c

@@ -2320,7 +2320,7 @@ SWITCH_STANDARD_APP(capture_function)
 	if (!zstr(data) && (lbuf = switch_core_session_strdup(session, data))
 		&& (argc = switch_separate_string(lbuf, '|', argv, (sizeof(argv) / sizeof(argv[0])))) == 3) {
 		if ((proceed = switch_regex_perform(argv[1], argv[2], &re, ovector, sizeof(ovector) / sizeof(ovector[0])))) {
-			switch_capture_regex(re, proceed, argv[1], ovector, argv[0], switch_regex_set_var_callback, session);
+			switch_capture_regex(re, proceed, argv[1], ovector, argv[0], (switch_cap_callback_t)switch_regex_set_var_callback, session);
 		}
 		switch_regex_safe_free(re);
 	} else {

src/mod/dialplans/mod_dialplan_xml/mod_dialplan_xml.c

@@ -224,7 +224,7 @@ static int parse_exten(switch_core_session_t *session, switch_caller_profile_t *
 		} else {
 			if (field && strchr(expression, '(')) {
 				switch_channel_set_variable(channel, "DP_MATCH", NULL);
-				switch_capture_regex(re, proceed, field_data, ovector, "DP_MATCH", switch_regex_set_var_callback, session);
+				switch_capture_regex(re, proceed, field_data, ovector, "DP_MATCH", (switch_cap_callback_t)switch_regex_set_var_callback, session);
 			}
 
 			for (xaction = switch_xml_child(xcond, "action"); xaction; xaction = xaction->next) {

src/switch_event.c

@@ -963,7 +963,7 @@ static switch_status_t switch_event_base_add_header(switch_event_t *event, switc
 		header->array = m;
 
 	redraw:
-
+		len = 0;
 		for(j = 0; j < header->idx; j++) {
 			len += strlen(header->array[j]) + 2;
 		}