replaced wxStream::GetSize() with GetLength() (still keep the former but it will be deprecated) (second part of patch 1063498)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30428 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/include/wx/wxPython/pyistream.h

@@ -69,7 +69,7 @@ public:
 class wxPyCBInputStream : public wxInputStream {
 public:
     ~wxPyCBInputStream();
-    virtual size_t GetSize() const;
+    virtual wxFileOffset GetLength() const;
 
     // factory function
     static wxPyCBInputStream* create(PyObject *py, bool block=true);

wxPython/src/helpers.cpp

@@ -1385,7 +1385,7 @@ PyObject* wxPyCBInputStream::getMethod(PyObject* py, char* name) {
 }
 
 
-size_t wxPyCBInputStream::GetSize() const {
+wxFileOffset wxPyCBInputStream::GetLength() const {
     wxPyCBInputStream* self = (wxPyCBInputStream*)this; // cast off const
     if (m_seek && m_tell) {
         wxFileOffset temp = self->OnSysTell();
@@ -1394,7 +1394,7 @@ size_t wxPyCBInputStream::GetSize() const {
         return ret;
     }
     else
-        return 0;
+        return wxInvalidOffset;
 }