Fixed incorrect parameters order in calls to fwrite

[Andriy Palamarchuk]

In dlls/msvcrd/file.c fwrite was called with
parameters "size" and "nmemb" swapped places. Usually
this works fine, bug fwrite crashed when
nmemb (passed as size) == 0.
Added check to fwrite for size == 0.
Fixed order and format of "size" and "nmemb"
parameters in calls to fwrite.

Andriy Palamarchuk

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