[libgfortran, patch] Minor simplification in find_option

[FX]

Dear all,

The attached small patch simplifies the code in the library's find_option() function, so that we don't repeatedly call fstrlen() on the same string. We now compute the length once before the start of the loop. This allows to inline the remaining of compare0.

Bootstrapped and regtested on x86_64-linux, OK to commit?

FX


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