Make LISTVIEW_ProcessLetterKeys accept unicode characters

[Igor Tarasov]

Using isalnum made it unuseable for non-latin characters.
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diff --git a/dlls/comctl32/listview.c b/dlls/comctl32/listview.c
index b8545fd..6b89766 100644
--- a/dlls/comctl32/listview.c
+++ b/dlls/comctl32/listview.c
@@ -1530,7 +1530,7 @@ static INT LISTVIEW_ProcessLetterKeys(LISTVIEW_INFO *infoPtr, WPARAM charCo
     if (!charCode || !keyData) return 0;

     /* only allow the valid WM_CHARs through */
-    if (!isalnum(charCode) &&
+    if (!isalnumW(charCode) &&
         charCode != '.' && charCode != '`' && charCode != '!' &&
         charCode != '@' && charCode != '#' && charCode != '$' &&
         charCode != '%' && charCode != '^' && charCode != '&' &&