Fix more harmless warnings.

Fix a warning about unused parameters and another about signed/unsigned
comparison during samples and tests compilation.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63873 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/stc/edit.cpp

@@ -190,7 +190,7 @@ void Edit::OnEditClear (wxCommandEvent &WXUNUSED(event)) {
     Clear ();
 }
 
-void Edit::OnKey  (wxStyledTextEvent &event)
+void Edit::OnKey (wxStyledTextEvent &WXUNUSED(event))
 {
     wxMessageBox("OnKey");
 }

tests/sizers/boxsizer.cpp

@@ -185,7 +185,6 @@ void BoxSizerTestCase::Size3()
     child[1] = new wxWindow(m_win, wxID_ANY);
     child[2] = new wxWindow(m_win, wxID_ANY);
 
-    int j;
     for ( unsigned i = 0; i < WXSIZEOF(layoutTestData); i++ )
     {
         LayoutTestData ltd = layoutTestData[i];
@@ -219,6 +218,8 @@ void BoxSizerTestCase::Size3()
             }
 
             m_sizer->Clear();
+
+            unsigned j;
             for ( j = 0; j < WXSIZEOF(child); j++ )
                 ltd.AddToSizer(m_sizer, child[j], j);