Added distribution script

Corrected wxGTK.spec
  Applied socket patch
  Small updates


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1510 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/sckaddr.cpp

@@ -195,7 +195,11 @@ wxString wxIPV4address::Hostname()
 
   h_ent = gethostbyaddr((char *)&(m_addr->sin_addr), sizeof(m_addr->sin_addr),
 			GetFamily());
-  return wxString(h_ent->h_name);
+			
+  if (!h_ent)
+     return wxString("");
+  else
+     return wxString(h_ent->h_name);
 }
 
 unsigned short wxIPV4address::Service()