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.

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1224,
 /**/
     1223,
 /**/