conf: replaced getConfigParamValue() with config_get_string()

src/conf.c

@@ -376,12 +376,13 @@ config_get_next_param(const char *name, struct config_param * last)
 	return param;
 }
 
-char *getConfigParamValue(const char *name)
+const char *
+config_get_string(const char *name, const char *default_value)
 {
 	struct config_param *param = config_get_param(name);
 
-	if (!param)
-		return NULL;
+	if (param == NULL)
+		return default_value;
 
 	return param->value;
 }

src/conf.h

@@ -98,7 +98,8 @@ config_get_param(const char *name)
 	return config_get_next_param(name, NULL);
 }
 
-char *getConfigParamValue(const char *name);
+const char *
+config_get_string(const char *name, const char *default_value);
 
 struct block_param *
 getBlockParam(struct config_param *param, const char *name);

src/database.c

@@ -281,7 +281,7 @@ db_load(void)
 			foundVersion = true;
 		} else if (g_str_has_prefix(buffer, DIRECTORY_FS_CHARSET)) {
 			char *fsCharset;
-			char *tempCharset;
+			const char *tempCharset;
 
 			if (foundFsCharset)
 				g_error("already found fs charset in db");
@@ -289,7 +289,8 @@ db_load(void)
 			foundFsCharset = true;
 
 			fsCharset = &(buffer[strlen(DIRECTORY_FS_CHARSET)]);
-			if ((tempCharset = getConfigParamValue(CONF_FS_CHARSET))
+			tempCharset = config_get_string(CONF_FS_CHARSET, NULL);
+			if (tempCharset != NULL
 			    && strcmp(fsCharset, tempCharset)) {
 				g_message("Using \"%s\" for the "
 					  "filesystem charset "

src/pcm_resample_libsamplerate.c

@@ -42,7 +42,7 @@ void pcm_resample_deinit(struct pcm_resample_state *state)
 
 static int pcm_resample_get_converter(void)
 {
-	const char *conf = getConfigParamValue(CONF_SAMPLERATE_CONVERTER);
+	const char *conf = config_get_string(CONF_SAMPLERATE_CONVERTER, NULL);
 	long convalgo;
 	char *test;
 	const char *test2;

src/tag_id3.c

@@ -55,13 +55,13 @@ static id3_utf8_t * processID3FieldString (int is_id3v1, const id3_ucs4_t *ucs4,
 {
 	id3_utf8_t *utf8, *utf8_stripped;
 	id3_latin1_t *isostr;
-	char *encoding;
+	const char *encoding;
 
 	if (type == TAG_ITEM_GENRE)
 		ucs4 = id3_genre_name(ucs4);
 	/* use encoding field here? */
 	if (is_id3v1 &&
-	    (encoding = getConfigParamValue(CONF_ID3V1_ENCODING))) {
+	    (encoding = config_get_string(CONF_ID3V1_ENCODING, NULL)) != NULL) {
 		isostr = id3_ucs4_latin1duplicate(ucs4);
 		if (G_UNLIKELY(!isostr)) {
 			return NULL;