added wxUSE_TASKBARICON; corrected condition for generating the taskbar sample makefile in configure

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47557 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -1202,17 +1202,20 @@ public:
     // implicit conversion to C string
     operator wxCStrData() const { return c_str(); }
 
-    // these operators conflict with operators for conversion to std::string,
-    // so they must be disabled in STL build:
+    // the first two operators conflict with operators for conversion to
+    // std::string and they must be disabled in STL build; the next one only
+    // makes sense if conversions to char* are also defined and not defining it
+    // in STL build also helps us to get more clear error messages for the code
+    // which relies on implicit conversion to char* in STL build
 #if !wxUSE_STL
     operator const char*() const { return c_str(); }
     operator const wchar_t*() const { return c_str(); }
-#endif
 
     // implicit conversion to untyped pointer for compatibility with previous
     // wxWidgets versions: this is the same as conversion to const char * so it
     // may fail!
     operator const void*() const { return c_str(); }
+#endif // wxUSE_STL
 
     // identical to c_str(), for MFC compatibility
     const wxCStrData GetData() const { return c_str(); }