Remove extraneous semicolons after wxDECL_FOR_STRICT_MINGW32().

This macro shouldn't be followed by a semicolon because it can be empty, so
remove the extra semicolons to avoid -Wpedantic g++ warnings about it.

src/unix/dir.cpp

@@ -100,6 +100,9 @@ wxDirData::wxDirData(const wxString& dirname)
 
     // do open the dir
     m_dir = opendir(m_dirname.fn_str());
+
+    wxLogSysError(12, _("Cannot enumerate files in directory '%s'"),
+                  m_dirname.c_str());
 }
 
 wxDirData::~wxDirData()