patch 8.2.4170: MS-Windows: still using old message API calls

Problem:    MS-Windows: still using old message API calls.
Solution:   Call the "W" functions directly. (Ken Takata, closes #9582)
diff --git a/src/os_mswin.c b/src/os_mswin.c
index c6617c8..5db7bb7 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -1123,12 +1123,12 @@
 {
     MSG msg;
 
-    while (!*bUserAbort && pPeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+    while (!*bUserAbort && PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE))
     {
-	if (!hDlgPrint || !pIsDialogMessage(hDlgPrint, &msg))
+	if (!hDlgPrint || !IsDialogMessageW(hDlgPrint, &msg))
 	{
 	    TranslateMessage(&msg);
-	    pDispatchMessage(&msg);
+	    DispatchMessageW(&msg);
 	}
     }
     return !*bUserAbort;
@@ -2576,10 +2576,10 @@
 {
     MSG msg;
 
-    while (pPeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+    while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE))
     {
 	TranslateMessage(&msg);
-	pDispatchMessage(&msg);
+	DispatchMessageW(&msg);
     }
 }