patch 8.1.0044: if a test function exists Vim this may go unnoticed

Problem:    If a test function exists Vim this may go unnoticed.
Solution:   Check for a test funtion quitting Vim.  Fix tests that did exit
            Vim.
diff --git a/src/version.c b/src/version.c
index 100506b..dfdc07d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    44,
+/**/
     43,
 /**/
     42,