patch 8.2.4783: Coverity warns for leaking memory

Problem:    Coverity warns for leaking memory.
Solution:   Use another strategy freeing "theline".
diff --git a/src/version.c b/src/version.c
index 7f792d2..a66d7d5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4783,
+/**/
     4782,
 /**/
     4781,