check for null string

2017-10-04 20:03:59 +02:00
parent 58c7b37661
commit ef11efce55
1 changed files with 2 additions and 0 deletions
--- a/src/Base/ParameterPy.cpp
+++ b/src/Base/ParameterPy.cpp
@@ -69,6 +69,8 @@ public:
    }
    virtual void OnChange(ParameterGrp::SubjectType &rCaller,ParameterGrp::MessageType Reason)
    {
+        if (!Reason || Reason[0] == '\0')
+            return;
        Base::PyGILStateLocker lock;
        try {
            ParameterGrp& rGrp = static_cast<ParameterGrp&>(rCaller);