patch 8.1.0038: popup test causes Vim to exit

Problem:    Popup test causes Vim to exit.
Solution:   Disable the broken part of the test for now.
diff --git a/src/version.c b/src/version.c
index 100c01e..caec4d6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    38,
+/**/
     37,
 /**/
     36,