user32/tests: check return value of GetUpdateRect in test_validatergn (try 2)

[Austin English]

Set LastError and print it as a decimal.

-- 
-Austin
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diff --git a/dlls/user32/tests/win.c b/dlls/user32/tests/win.c
index 8f0f42d..cbd0ee7 100644
--- a/dlls/user32/tests/win.c
+++ b/dlls/user32/tests/win.c
@@ -3212,11 +3212,15 @@ static void test_validatergn(HWND hwnd)
     InvalidateRect( child, NULL, 1);
     GetWindowRect( child, &rc);
     MapWindowPoints( NULL, hwnd, (POINT*) &rc, 2);
+    SetLastError(0xdeadbeef);
     ret = GetUpdateRect( child, &rc2, 0);
+    ok(ret, "GetUpdateRect failed %d\n", GetLastError());
     ok( rc2.right > rc2.left && rc2.bottom > rc2.top,
             "Update rectangle is empty!\n");
     ValidateRect( hwnd, &rc);
+    SetLastError(0xdeadbeef);
     ret = GetUpdateRect( child, &rc2, 0);
+    ok(!ret, "GetUpdateRect failed %d\n", GetLastError());
     ok( rc2.left == 0 && rc2.top == 0 && rc2.right == 0 && rc2.bottom == 0,
             "Update rectangle %d,%d-%d,%d is not empty!\n", rc2.left, rc2.top,
             rc2.right, rc2.bottom);
@@ -3227,7 +3231,9 @@ static void test_validatergn(HWND hwnd)
     MapWindowPoints( NULL, hwnd, (POINT*) &rc, 2);
     rgn = CreateRectRgnIndirect( &rc);
     ValidateRgn( hwnd, rgn);
+    SetLastError(0xdeadbeef);
     ret = GetUpdateRect( child, &rc2, 0);
+    ok(!ret, "GetUpdateRect failed %d\n", GetLastError());
     ok( rc2.left == 0 && rc2.top == 0 && rc2.right == 0 && rc2.bottom == 0,
             "Update rectangle %d,%d-%d,%d is not empty!\n", rc2.left, rc2.top,
             rc2.right, rc2.bottom);