patch 8.2.5120: searching for quotes may go over the end of the line

Problem:    Searching for quotes may go over the end of the line.
Solution:   Check for running into the NUL.
diff --git a/src/version.c b/src/version.c
index b9b3347..df9d576 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5120,
+/**/
     5119,
 /**/
     5118,