conf: make config_param.num_block_params unsigned

src/conf.c

@@ -91,11 +91,10 @@ static void
 config_param_free(gpointer data, G_GNUC_UNUSED gpointer user_data)
 {
 	struct config_param *param = data;
-	int i;
 
 	g_free(param->value);
 
-	for (i = 0; i < param->num_block_params; i++) {
+	for (unsigned i = 0; i < param->num_block_params; i++) {
 		g_free(param->block_params[i].name);
 		g_free(param->block_params[i].value);
 	}
@@ -449,12 +448,11 @@ struct block_param *
 config_get_block_param(const struct config_param * param, const char *name)
 {
 	struct block_param *ret = NULL;
-	int i;
 
 	if (param == NULL)
 		return NULL;
 
-	for (i = 0; i < param->num_block_params; i++) {
+	for (unsigned i = 0; i < param->num_block_params; i++) {
 		if (0 == strcmp(name, param->block_params[i].name)) {
 			if (ret) {
 				g_warning("\"%s\" first defined on line %i, and "

src/conf.h

@@ -86,7 +86,7 @@ struct config_param {
 	unsigned int line;
 
 	struct block_param *block_params;
-	int num_block_params;
+	unsigned num_block_params;
 };
 
 void config_global_init(void);