patch 9.1.0429: Coverity complains about eval.c refactor

Problem:  Coverity complains about eval.c refactor
          (after v9.1.0422)
Solution: Check that buf is not used un-initialized,
          add explicit conditions for save and restore
          of copyID

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index acec967..b2f0416 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    429,
+/**/
     428,
 /**/
     427,