patch 9.0.2151: 'breakindent' is not drawn after diff filler lines

Problem:  'breakindent' is not drawn after diff filler lines.
Solution: Correct check for whether 'breakindent' should be drawn.

closes: #13624

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/dumps/Test_diff_breakindent_after_filler.dump b/src/testdir/dumps/Test_diff_breakindent_after_filler.dump
new file mode 100644
index 0000000..d9c4873
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_breakindent_after_filler.dump
@@ -0,0 +1,8 @@
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @18||+1&&| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @18
+| +0#0000e05#a8a8a8255@1|b+0#0000000#5fd7ff255| @18||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@19
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|c@17||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|c@17
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|c@17||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|c@17
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|c@13| @3||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|c@12>c| @3
+|~+0#4040ff13&| @20||+1#0000000&|~+0#4040ff13&| @20
+|~| @20||+1#0000000&|~+0#4040ff13&| @20
+| +0#0000000&@26|2|,|5|2|-|5|6| @6|A|l@1| 
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index e05d916..930fd7b 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
Binary files differ