Change wxSound ctor from in-memory data to use size_t/void *.

This constructor previously used int and, especially annoyingly, wxByte* for
the data. Use standard void* for untyped binary data instead.

Also document this ctor as it seems to be implemented in all ports.

Closes #13451.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69178 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/sound.h

@@ -37,6 +37,16 @@ public:
     */
     wxSound(const wxString& fileName, bool isResource = false);
 
+    /**
+        Constructs a wave object from in-memory data.
+
+        @param size
+            Size of the buffer pointer to by @a data.
+        @param data
+            The buffer containing the sound data in WAV format.
+     */
+    wxSound(size_t size, const void* data);
+
     /**
         Destroys the wxSound object.
     */