patch 9.1.1289: tests: no test for matchparen plugin with WinScrolled event

Problem:  tests: no test for matchparen plugin with WinScrolled event
Solution: add missing test

closes: #10942

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/dumps/Test_matchparen_winscrolled1.dump b/src/testdir/dumps/Test_matchparen_winscrolled1.dump
new file mode 100644
index 0000000..60232cf
--- /dev/null
+++ b/src/testdir/dumps/Test_matchparen_winscrolled1.dump
@@ -0,0 +1,7 @@
+|f+0&#ffffff0|o@1|b|a|r| |{+0&#40ffff15| +0&#ffffff0@66
+@75
+@75
+@75
+>}+0&#40ffff15| +0&#ffffff0@73
+|~+0#4040ff13&| @73
+| +0#0000000&@56|5|,|1| @10|A|l@1|