patch 9.0.1224: cannot call a :def function with a number for float argument

Problem:    Cannot call a :def function with a number for a float argument.
Solution:   Accept a number as well, convert it to a float.
diff --git a/src/version.c b/src/version.c
index f15061a..29c788d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1224,
+/**/
     1223,
 /**/
     1222,