input/curl, output/pulse: fix "unused local variable" warnings

src/input/curl_input_plugin.c

@@ -177,7 +177,7 @@ buffer_free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
 
 	assert(buffer->consumed <= buffer->size);
 
-	g_free(data);
+	g_free(buffer);
 }
 
 /**

src/output/pulse_output_plugin.c

@@ -72,7 +72,8 @@ pulse_output_set_mixer(struct pulse_output *po, struct pulse_mixer *pm)
 }
 
 void
-pulse_output_clear_mixer(struct pulse_output *po, struct pulse_mixer *pm)
+pulse_output_clear_mixer(struct pulse_output *po,
+			 G_GNUC_UNUSED struct pulse_mixer *pm)
 {
 	assert(po != NULL);
 	assert(pm != NULL);