Squish: Try to fix test for testing machines

Change-Id: I3213594c9ad7b947c5863d22f87e62adf418d983
Reviewed-by: Robert Loehning <robert.loehning@digia.com>

tests/system/suite_editors/tst_modify_readonly/test.py

@@ -82,6 +82,8 @@ def testSaveChangesAndMakeWritable(modifiedFiles, readOnlyFiles):
             clickButton(waitForObject("{text='Make Writable' type='QPushButton' unnamed='1' "
                                       "visible='1' window=%s}" % readOnlyMBoxStr))
             try:
+                # avoid an AUT crash that happens frequently on the testing machines
+                if currentApplicationContext().isRunning:
                     waitForObject(cannotResetStr, 3000)
                     # should not be possible
                     test.fail("Could not reset file '%s' to writable state." % currentFile)