comctl32: Constify some variables.
diff --git a/dlls/comctl32/commctrl.c b/dlls/comctl32/commctrl.c
index bd0563f..a5796f3 100644
--- a/dlls/comctl32/commctrl.c
+++ b/dlls/comctl32/commctrl.c
@@ -1490,7 +1490,7 @@
     return FALSE;
 }
 
-static int CALLBACK PathWordBreakProc(LPWSTR lpch, int ichCurrent, int cch, int code)
+static int CALLBACK PathWordBreakProc(LPCWSTR lpch, int ichCurrent, int cch, int code)
 {
     if (code == WB_ISDELIMITER)
         return IsDelimiter(lpch[ichCurrent]);