[multiple] quiet compiler warnings --without-pcre

quiet compiler warnings for ./configure --without-pcre

src/data_config.c

@@ -213,6 +213,9 @@ int data_config_pcre_exec(data_config *dc, cond_cache_t *cache, buffer *b) {
         cache->comp_value = b; /* holds pointer to b (!) for pattern subst */
     return cache->patterncount;
 #else
+    UNUSED(dc);
+    UNUSED(cache);
+    UNUSED(b);
     return 0;
 #endif
 }

src/mod_dirlisting.c

@@ -87,8 +87,8 @@ static excludes_buffer *excludes_buffer_init(void) {
 	return exb;
 }
 
-static int excludes_buffer_append(excludes_buffer *exb, buffer *string) {
 #ifdef HAVE_PCRE_H
+static int excludes_buffer_append(excludes_buffer *exb, buffer *string) {
 	size_t i;
 	const char *errptr;
 	int erroff;
@@ -126,13 +126,8 @@ static int excludes_buffer_append(excludes_buffer *exb, buffer *string) {
 	exb->used++;
 
 	return 0;
-#else
-	UNUSED(exb);
-	UNUSED(string);
-
-	return -1;
-#endif
 }
+#endif
 
 static void excludes_buffer_free(excludes_buffer *exb) {
 #ifdef HAVE_PCRE_H
@@ -291,7 +286,6 @@ SETDEFAULTS_FUNC(mod_dirlisting_set_defaults) {
 
 		if (NULL != (du_excludes = array_get_element(config->value, CONFIG_EXCLUDE))) {
 			array *excludes_list;
-			size_t j;
 
 			excludes_list = ((data_array*)du_excludes)->value;
 
@@ -308,7 +302,7 @@ SETDEFAULTS_FUNC(mod_dirlisting_set_defaults) {
 				return HANDLER_ERROR;
 			}
 #else
-			for (j = 0; j < excludes_list->used; j++) {
+			for (size_t j = 0; j < excludes_list->used; ++j) {
 				data_unset *du_exclude = excludes_list->data[j];
 
 				if (du_exclude->type != TYPE_STRING) {
@@ -967,7 +961,9 @@ static int http_list_directory(server *srv, connection *con, plugin_data *p, buf
 	files.used = 0;
 
 	while ((dent = readdir(dp)) != NULL) {
+#ifdef HAVE_PCRE_H
 		unsigned short exclude_match = 0;
+#endif
 
 		if (dent->d_name[0] == '.') {
 			if (hide_dotfiles)

src/mod_trigger_b4_dl.c

@@ -257,6 +257,8 @@ SETDEFAULTS_FUNC(mod_trigger_b4_dl_set_defaults) {
 	return HANDLER_GO_ON;
 }
 
+#if defined(HAVE_PCRE_H)
+
 #define PATCH(x) \
 	p->conf.x = s->x;
 static int mod_trigger_b4_dl_patch_connection(server *srv, connection *con, plugin_data *p) {
@@ -322,12 +324,14 @@ static int mod_trigger_b4_dl_patch_connection(server *srv, connection *con, plug
 }
 #undef PATCH
 
+#endif
+
 URIHANDLER_FUNC(mod_trigger_b4_dl_uri_handler) {
+#if defined(HAVE_PCRE_H)
 	plugin_data *p = p_d;
 	const char *remote_ip;
 	buffer *vb;
 
-#if defined(HAVE_PCRE_H)
 	int n;
 # define N 10
 	int ovec[N * 3];