patch 8.0.0168: not all float functionality is tested

Problem:    Still some float functionality is not covered by tests.
Solution:   Add more tests. (Dominique Pelle, closes #1364)
diff --git a/src/version.c b/src/version.c
index c74052d..6294188 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    168,
+/**/
     167,
 /**/
     166,