coverity#982760 Dereference null return value

Change-Id: I779fa5fa418370dd6c53308943374e981f65ae29

pyuno/inc/pyuno/pyuno.hxx

@@ -68,6 +68,13 @@ extern "C" LO_DLLPUBLIC_PYUNO
 namespace pyuno
 {
 
+enum __NotNull
+{
+    /** definition of a no acquire enum for ctors
+     */
+    NOT_NULL
+};
+
 /** Helper class for keeping references to python objects.
     BEWARE: Look up every python function you use to check
     whether you get an acquired or not acquired object pointer
@@ -88,6 +95,12 @@ public:
 
     PyRef( PyObject * p, __sal_NoAcquire ) : m( p ) {}
 
+    PyRef( PyObject * p, __sal_NoAcquire, __NotNull ) : m( p )
+    {
+        if (!m)
+            throw std::bad_alloc();
+    }
+
     PyRef( const PyRef &r ) : m( r.get() ) { Py_XINCREF( m ); }
 
     ~PyRef() { Py_XDECREF( m ); }

pyuno/source/module/pyuno_type.cxx

@@ -265,7 +265,7 @@ PyObject *PyUNO_Enum_new( const char *enumBase, const char *enumValue, const Run
 PyObject* PyUNO_Type_new (const char *typeName , TypeClass t , const Runtime &r )
 {
     // retrieve type object
-    PyRef args( PyTuple_New( 2 ), SAL_NO_ACQUIRE );
+    PyRef args(PyTuple_New( 2 ), SAL_NO_ACQUIRE, NOT_NULL);
 
     PyTuple_SetItem( args.get() , 0 , PyStr_FromString( typeName ) );
     PyObject *typeClass = PyUNO_Enum_new( "com.sun.star.uno.TypeClass" , typeClassToString(t), r );