Try removing the event handler call in CVMouseMoveRuler.
Merge pull request #1462 from fontforge/ufo_libxml2_1

Remove more comma-adding code.
Merge branch 'master' into issue_1402
Fix infinite stack recursion on certain errors.
Merge pull request #1464 from fontforge/issue_1402

Fix infinite stack recursion crashes.
In IntersectLines, cache data to be placed in inter until return time so as to avoid inconsistent behavior when somebody calls it with the same address as an input and an output.
Add comments.
Merge pull request #1470 from fontforge/intersect_lines_fix

Fix IntersectLines NaN problems.
comment FONTFORGE_ARG_WITH_LIBPNG() macro
Fix FONTFORGE_ARG_WITH_LIBJPEG() to hard-stop if "--with" but not there

FONTFORGE_ARG_WITH_LIBJPEG complains of no pkg but doesn't test for it.
Fixed so that ./configure will hard-stop if user requires --with-libjpeg
instead of previous wantings. Added more info in configure.ac and
fixed typos in libpng and libreadline checks.
Fix FONTFORGE_ARG_WITH_LIBTIFF() to hard-stop if "--with" but not there

Ensure libtiff is >= version4.0 by checking for a function removed in 4.0
Check for header and library. Do hardstop if user wants --with but libtiff
doesn't exist, or lower than 4.0, or no developer tiff*.h header files.
Merge pull request #1471 from JoesCat/check_headers_and_libraries_2

hard-stops for with-libjpeg and/or with-libtiff
Avoid Python references in ufo.c when compiling without Python.
Add strtok_r compatibility for Windows.
Fix a missing declaration.
Really fix that missing declaration.