patch 7.4.2218
Problem:    Can't build with +timers when +digraph is not included.
Solution:   Change #ifdef for e_number_exp. (Damien)
diff --git a/src/version.c b/src/version.c
index fc9a880..bae2153 100644
--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2218,
+/**/
     2217,
 /**/
     2216,