fix profile migration on windows (and probably mac.)
on UNIX, "mail.directory" is always set. on windows, it may be set to "" add the PL_strlen test to tree "" as not being set, so we assume the default 4.x location, which is what we want. git-svn-id: svn://10.0.0.236/trunk@47160 18797224-902f-48f8-a5cc-f745e15eee43
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@@ -582,7 +582,7 @@ nsPrefMigration::GetDirFromPref(const char *oldProfilePath, const char* newProfi
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if (NS_FAILED(rv)) return rv;
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foundPref = m_prefs->CopyCharPref(pref, oldPath);
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if((foundPref == 0) && (*oldPath))
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if((foundPref == 0) && (*oldPath) && (PL_strlen(*oldPath) > 0))
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{
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#ifdef XP_UNIX
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// what if they don't want to go to <profile>/<newDirName>?
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