Wrap variable initializations after '=' consistently

Replace a few occurrences of

        type var
            = value;

with

        type var =
            value;

which is used much more widely in wx sources for consistency.

Also get rid of a couple of such lines, when it could be done easily.

No real changes.

src/generic/progdlgg.cpp

@@ -244,8 +244,8 @@ bool wxGenericProgressDialog::Create( const wxString& title,
 
     const int borderFlags = wxALL;
 
-    wxSizerFlags sizerFlags
-        = wxSizerFlags().Border(borderFlags, LAYOUT_MARGIN);
+    wxSizerFlags sizerFlags =
+        wxSizerFlags().Border(borderFlags, LAYOUT_MARGIN);
 
     if ( HasPDFlag(wxPD_CAN_SKIP) )
     {