#16 libid3tag: Fix conflicting types for 'id3_frametype_lookup'

[Wolfgang Stöggl]

Attached is a patch, which fixes the following build error:

frametype.gperf:322:1: error: conflicting types for 'id3_frametype_lookup'
In file included from frametype.gperf:32:
../libid3tag-0.15.1b/frametype.h:39:29: note: previous declaration of 'id3_frametype_lookup' was here
   39 | struct id3_frametype const *id3_frametype_lookup(register char const *,
      |                             ^~~~~~~~~~~~~~~~~~~~
make[2]: *** [Makefile:571: frametype.lo] Error 1

Source of patch:
https://sources.debian.org/data/main/libi/libid3tag/0.15.1b-14/debian/patches/gperf_size_t.patch
Further info:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869598