meson, pw-top: use ncursesw

Some PulseAudio clients are known to use localised client and
stream names as values for the respective PulseAudio props, most
notably plain old pavucontrol.

We call setlocale before anything else for ncurses to display
localised text correctly. We also want to link with ncursesw, which
supports multibyte Unicode locales.

src/tools/pw-top.c

@@ -25,6 +25,7 @@
 #include <stdio.h>
 #include <signal.h>
 #include <getopt.h>
+#include <locale.h>
 #include <ncurses.h>
 
 #include <spa/utils/result.h>
@@ -495,6 +496,7 @@ int main(int argc, char *argv[])
 	struct timespec value, interval;
 	struct node *n;
 
+	setlocale(LC_ALL, "");
 	pw_init(&argc, &argv);
 
 	spa_list_init(&data.node_list);