patch 8.0.0458: potential crash if adding list or dict to dict fails

Problem:    Potential crash if adding list or dict to dict fails.
Solution:   Make sure the reference count is correct. (Nikolai Pavlov, closes
            #1555)
diff --git a/src/version.c b/src/version.c
index 81ef80f..2e21198 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    458,
+/**/
     457,
 /**/
     456,