msvcrt/tests: Remove dead assignment (Clang)

[Octavian Voicu]

2011/7/7 Frédéric Delanoy <frederic.delanoy at gmail.com>:
>         c = outbuffer[sizeof(outbuffer) - 1];
>         ok(ungetc(c, file) == c, "ungetc did not return its input for bufmode=%x\n", bufmodes[bufmode]);
>         ok(!feof(file), "feof after ungetc returned EOF for bufmode=%x\n", bufmodes[bufmode]);
> -        ok((c = fgetc(file)) != EOF, "getc after ungetc returned EOF for bufmode=%x\n", bufmodes[bufmode]);
> +        ok(fgetc(file) != EOF, "getc after ungetc returned EOF for bufmode=%x\n", bufmodes[bufmode]);
>         ok(c == outbuffer[sizeof(outbuffer) - 1],
>            "getc did not return ungetc'd data for bufmode=%x\n", bufmodes[bufmode]);

Also, this change doesn't look like it's removing a dead assignment,
but it does make the test ok(c == outbuffer[sizeof(outbuffer) - 1],
...) always succeed.

Octavian