msi: Fix a few test failures on win9x.

dlls/msi/tests/suminfo.c

@@ -391,10 +391,11 @@ static void test_summary_binary(void)
     type = 0;
     r = MsiSummaryInfoGetProperty(hsuminfo, PID_LASTPRINTED, &type, NULL, NULL, sval, &sz);
     ok(r == ERROR_SUCCESS, "MsiSummaryInfoGetProperty failed\n");
-    ok(!strcmp(sval, ""), "Expected empty string, got %s\n", sval);
+    ok(!lstrcmpA(sval, "") || !lstrcmpA(sval, "7"),
+        "Expected empty string or \"7\", got \"%s\"\n", sval);
     todo_wine {
     ok(type == VT_LPSTR, "Expected VT_LPSTR, got %d\n", type);
-    ok(sz == 0, "Expected 0, got %d\n", sz);
+    ok(sz == 0 || sz == 1, "Expected 0 or 1, got %d\n", sz);
     }
 
     ival = -1;