Problem in wchar.h in Open C (Symbian)

The following errors encountered in OpenC:

/EPOC32/include/stdapis/wchar.h:92: error: `__mbstate_t' does not name a type
/EPOC32/include/stdapis/wchar.h:97: error: `__size_t' does not name a type
...


Googled and I found similar problem posted in forum.nokia.com (http://discussion.forum.nokia.com/forum/showthread.php?t=137500) but no relevant answer how to solve the problem. How I solved it is posted in comment#6.


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"Computer science education cannot make anybody an expert programmer any more than studying brushes and pigment can make somebody an expert painter" Eric Raymond