Fix wxHash{Set,Map} compilation with g++ 4.7 in C++11 mode.

Fully qualify the hasher and comparator classes used with
WX_DECLARE_HASH_{SET,MAP} macros as they're used as base classes by the
standard library implementation in g++ 4.7 and using them without the scope
operator results in compilation errors because they're interpreted as being
(inaccessible) base classes and not the global ones.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70556 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/hashmap.h

@@ -83,8 +83,8 @@
     @code
     WX_DECLARE_HASH_MAP( int,
                          wxString,
-                         wxIntegerHash,
-                         wxIntegerEqual,
+                         ::wxIntegerHash,
+                         ::wxIntegerEqual,
                          MyHash );
 
     // using an user-defined class for keys
@@ -119,8 +119,8 @@
 
     WX_DECLARE_HASH_MAP( MyKey,      // type of the keys
                          SOME_TYPE,  // any type you like
-                         MyKeyHash,  // hasher
-                         MyKeyEqual, // key equality predicate
+                         ::MyKeyHash,  // hasher
+                         ::MyKeyEqual, // key equality predicate
                          CLASSNAME); // name of the class
     @endcode