patch 8.2.4703: memory leak in handling 'cinscopedecls'

Problem:    Memory leak in handling 'cinscopedecls'.
Solution:   Free the memory before returning.
diff --git a/src/version.c b/src/version.c
index 3cf9d18..bbbfeb7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4703,
+/**/
     4702,
 /**/
     4701,