Locate null map error report closer to occurrence.
Oops.
Merge pull request #1153 from JoesCat/master

More fontforge.appdata.xml edits thanks to feedback from Yuri and Richard
fontforge starts python without items in the sys.argv list but IPython expects at least one item there
Handle blank multiple substitution lookups better (without crashing) during TrueType output.
Merge pull request #1155 from fontforge/gsub_crash_1

Fix the crash from exporting a blank multiple substitution lookup to Truetype.
Merge pull request #1154 from graphicore/graphicore

 IPython expects at least one item in sys.argv
Various edits. desktop, AUTHORS, Makefile.am

Several edits to desktop files, mainly "C". Several New Authors.
Makefile.am - something broke MAC build on 27th, might be the += maybe?