patch 8.0.1213: setting 'mzschemedll' has no effect

Problem:    Setting 'mzschemedll' has no effect.
Solution:   Move loading .vimrc to before call to mzscheme_main().
diff --git a/src/version.c b/src/version.c
index 2ac4de9..160edbe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1213,
+/**/
     1212,
 /**/
     1211,