comctl32: Avoid hardcoding array lengths.

dlls/comctl32/ipaddress.c

@@ -339,7 +339,7 @@ static BOOL IPADDRESS_SetRange (IPADDRESS_INFO *infoPtr, int index, WORD range)
 
 static void IPADDRESS_ClearAddress (const IPADDRESS_INFO *infoPtr)
 {
-    WCHAR nil[1] = { 0 };
+    static const WCHAR nil[] = { 0 };
     int i;
 
     TRACE("\n");

dlls/comdlg32/printdlg.c

@@ -2433,7 +2433,7 @@ static WCHAR get_decimal_sep(void)
 
     if(!sep)
     {
-        WCHAR buf[2] = {'.',0};
+        WCHAR buf[] = {'.', 0};
         GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_SDECIMAL, buf, sizeof(buf) / sizeof(buf[0]));
         sep = buf[0];
     }