patch 8.2.4338: an error from an expression mapping messes up the display
Problem: An error from an expression mapping messes up the display.
Solution: When the expression results in an empty string return K_IGNORE.
In cmdline mode redraw the command line. (closes #9726)
diff --git a/src/version.c b/src/version.c
index a02fefd..db2a923 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 4338,
+/**/
4337,
/**/
4336,