log: handle binary files in --line-range patterns

log: handle binary files in --line-range patterns

When a file is binary patch.trydiff() would yield None for 'hunkrange'. Handle
this case in the hunksfilter() callback.
Add tests with and without diff.git option as binary handling differs
depending on this option's value.

--- a/mercurial/cmdutil.py	Tue Oct 17 22:46:08 2017 +0200
+++ b/mercurial/cmdutil.py	Wed Oct 18 19:00:33 2017 +0200
@@ -2652,6 +2652,9 @@
                 lineranges = fctxlineranges.get(fctx.path())
                 if lineranges is not None:
                     for hr, lines in hunks:
+                        if hr is None: # binary
+                            yield hr, lines
+                            continue
                         if any(mdiff.hunkinrange(hr[2:], lr)
                                for lr in lineranges):
                             yield hr, lines

--- a/tests/test-log-linerange.t	Tue Oct 17 22:46:08 2017 +0200
+++ b/tests/test-log-linerange.t	Wed Oct 18 19:00:33 2017 +0200
@@ -849,6 +849,39 @@
   +3
   +4
   
+
+Binary files work but without diff hunks filtering.
+(Checking w/ and w/o diff.git option.)
+
+  >>> open('binary', 'w').write('this\nis\na\nbinary\0')
+  $ hg add binary
+  $ hg ci -m 'add a binary file' --quiet
+  $ hg log -f -L binary,1-2 -p
+  changeset:   10:c96381c229df
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     add a binary file
+  
+  diff --git a/dir/binary b/dir/binary
+  new file mode 100644
+  index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..c2e1fbed209fe919b3f189a6a31950e9adf61e45
+  GIT binary patch
+  literal 17
+  Wc$_QA$SmdpqC~Ew%)G>+N(KNlNClYy
+  
+  
+  $ hg log -f -L binary,1-2 -p --config diff.git=false
+  changeset:   10:c96381c229df
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     add a binary file
+  
+  diff -r 6af29c3a778f -r c96381c229df dir/binary
+  Binary file dir/binary has changed
+  
+
 Option --follow is required.
 
   $ hg log -L foo,5-7