patch 9.0.0212: invalid memory access when compiling :unlet

Problem:    Invalid memory access when compiling :unlet.
Solution:   Don't read past the end of the line.
diff --git a/src/version.c b/src/version.c
index 3f0bf51..7de7158 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    212,
+/**/
     211,
 /**/
     210,