patch 8.0.0614: float2nr() is not exactly right

Problem:    float2nr() is not exactly right.
Solution:   Make float2nr() more accurate.  Turn test64 into a new style test.
            (Hirohito Higashi, closes #1688)
diff --git a/src/version.c b/src/version.c
index f5b5732..d312148 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    614,
+/**/
     613,
 /**/
     612,