ui/curses: Fix infinite loop on windows

Replace -1 comparisons for wint_t with WEOF to fix infinite loop caused by a
65535 == -1 comparison.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2905
Signed-off-by: William Hu <purplearmadillo77@proton.me>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
[ Marc-André - Add missing similar code change, remove a comment ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <tSO5to8--iex6QMThG3Z8ElfnNOUahK_yitw2G2tEVRPoMKV936CBdrpyfbeNpVEpziKqeQ1ShBwPOoDkofgApM8YWwnPKJR_JrPDThV8Bc=@proton.me>

ui/curses.c

@@ -265,7 +265,8 @@ static int curses2foo(const int _curses2foo[], const int _curseskey2foo[],
 
 static void curses_refresh(DisplayChangeListener *dcl)
 {
-    int chr, keysym, keycode, keycode_alt;
+    wint_t chr = 0;
+    int keysym, keycode, keycode_alt;
     enum maybe_keycode maybe_keycode = CURSES_KEYCODE;
 
     curses_winch_check();
@@ -284,8 +285,9 @@ static void curses_refresh(DisplayChangeListener *dcl)
         /* while there are any pending key strokes to process */
         chr = console_getch(&maybe_keycode);
 
-        if (chr == -1)
+        if (chr == WEOF) {
             break;
+        }
 
 #ifdef KEY_RESIZE
         /* this shouldn't occur when we use a custom SIGWINCH handler */
@@ -304,9 +306,9 @@ static void curses_refresh(DisplayChangeListener *dcl)
         /* alt or esc key */
         if (keycode == 1) {
             enum maybe_keycode next_maybe_keycode = CURSES_KEYCODE;
-            int nextchr = console_getch(&next_maybe_keycode);
+            wint_t nextchr = console_getch(&next_maybe_keycode);
 
-            if (nextchr != -1) {
+            if (nextchr != WEOF) {
                 chr = nextchr;
                 maybe_keycode = next_maybe_keycode;
                 keycode_alt = ALT;