patch 8.0.0367: types in include files may be inconsistent

Problem:    If configure defines _LARGE_FILES some include files are included
            before it is defined.
Solution:   Include vim.h first. (Sam Thursfield, closes #1508)
diff --git a/src/gui_athena.c b/src/gui_athena.c
index 3d78287..18e3a8b 100644
--- a/src/gui_athena.c
+++ b/src/gui_athena.c
@@ -9,6 +9,8 @@
  * See README.txt for an overview of the Vim source code.
  */
 
+#include "vim.h"
+
 #include <X11/StringDefs.h>
 #include <X11/Intrinsic.h>
 #ifdef FEAT_GUI_NEXTAW
@@ -34,7 +36,6 @@
 # include <X11/Xaw/AsciiText.h>
 #endif /* FEAT_GUI_NEXTAW */
 
-#include "vim.h"
 #ifndef FEAT_GUI_NEXTAW
 # include "gui_at_sb.h"
 #endif