removed extra semicolons to fix compilation with gcc -Wpedantic (patch 1701236)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45498 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/combo.h

@@ -647,7 +647,7 @@ public:
     // variable has been initialized before the call.
     // NOTE: It is not in constructor so the derived class doesn't need to redefine
     //       a default constructor of its own.
-    virtual void Init() { };
+    virtual void Init() { }
 
     virtual ~wxComboPopup();