#63 Makefile with a little character error

When trying to compile (make) version 0.92.3 in Mac OS X 10.7, this error appears:

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Compiling utils.c
cc1: error: unrecognized command line option "-Wno-unused-but-set-variable"

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That seems to be just a character error in makefile, line 18. Replacing

-Wno-unused....

to

-no-unused...

fix the problem.