Compiler warning: -Wunused-but-set-variable

[horta]

/Users/horta/code/imm3/build/_deps/tau-src/tau/tau.h:440:9: warning: variable 'numActualDigits' set but not used [-Wunused-but-set-variable]
    int numActualDigits = 0;
        ^
/Users/horta/code/imm3/build/_deps/tau-src/tau/tau.h:441:9: warning: variable 'numExpectedDigits' set but not used [-Wunused-but-set-variable]
    int numExpectedDigits = 0;