minor optimization to mbstowcs
authorRich Felker <dalias@aerifal.cx>
Thu, 4 Apr 2013 18:51:05 +0000 (14:51 -0400)
committerRich Felker <dalias@aerifal.cx>
Thu, 4 Apr 2013 18:51:05 +0000 (14:51 -0400)
there is no need to zero-fill an mbstate_t object in the caller;
mbsrtowcs will automatically treat a null pointer as the initial
state.


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