[PATCH] Fix Unicode handling in :INVERT readtable and :CASE :COMMON pathnames

Hello, Attached are fixes for ecl_string_case, which does not handle Unicode correctly. This shows up in two places in the CL run-time. Currently the READTABLE-CASE :INVERT issue is preventing Parenscript 2.8 from compiling. -- Vladimir Sedach Software engineering services in Los Angeles https://oneofus.la