patch 9.0.1662: crash when using a class member twice

Problem:    Crash when using a class member twice. (Christian J. Robinson)
Solution:   Make a copy of the value.
diff --git a/src/version.c b/src/version.c
index 437da65..8840b3a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1662,
+/**/
     1661,
 /**/
     1660,