[Base] remove some more superfluous nullptr checks

src/Base/Exception.cpp

@@ -344,7 +344,7 @@ PyObject * FileException::getPyObject()
 
 void FileException::setPyObject( PyObject * pydict)
 {
-    if (pydict!=nullptr) {
+    if (pydict) {
         Exception::setPyObject(pydict);
 
         Py::Dict edict(pydict);

src/Base/Interpreter.cpp

@@ -106,7 +106,7 @@ void PyException::ThrowException()
 
 void PyException::raiseException() {
     PyGILStateLocker locker;
-    if (PP_PyDict_Object!=nullptr) {
+    if (PP_PyDict_Object) {
         // delete the Python dict upon destruction of edict
         Py::Dict edict(PP_PyDict_Object, true);
         PP_PyDict_Object = nullptr;

src/Base/Parameter.cpp

@@ -700,7 +700,7 @@ std::string ParameterGrp::GetASCII(const char* Name, const char * pPreset) const
     DOMElement *pcElem = FindElement(_pGroupNode,"FCText",Name);
     // if not return preset
     if (!pcElem) {
-        if (pPreset==nullptr)
+        if (!pPreset)
             return std::string("");
         else
             return std::string(pPreset);

src/Base/PyObjectBase.cpp

@@ -353,7 +353,7 @@ int PyObjectBase::__setattro(PyObject *obj, PyObject *attro, PyObject *value)
 
     //Hint: In general we don't allow to delete attributes (i.e. value=0). However, if we want to allow
     //we must check then in _setattr() of all subclasses whether value is 0.
-    if ( value==nullptr ) {
+    if (!value) {
         PyErr_Format(PyExc_AttributeError, "Cannot delete attribute: '%s'", attr);
         return -1;
     }