input.c: move test functions within #CHECKING_P and into selftest::
gcc/ChangeLog:
* input.c (get_source_range_for_char): Rename to...
(selftest::get_source_range_for_char): ...this, and move within
the #if CHECKING_P guard.
(get_num_source_ranges_for_substring): Rename to...
(selftest::get_num_source_ranges_for_substring): ...this, move
within the #if CHECKING_P guard, and make static.
(selftest::assert_num_substring_ranges): Initialize
actual_num_ranges.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239550 138bc75d-0d04-0410-961f-82ee72b054a4