Merge pull request #3616 from RosettaCommons/BYachnin/release_unittest_build_fix
Fix release mode unit test build with newer gcc compilers
In newer gcc versions (6.3, for example), the unit test suite will not build because of a compiler warning that is treated as an error ('num' may be used uninitialized in this function). This small fix sets the value of res before running the code previously in isFloatNumber(), which fixes the error.
There are no test failures other than unstable tests in master.