Remove G_INLINE_FUNC from mark_split declaration.

This broke builds on MacOS and even recent Ubuntus.  The macro's
documentation strongly discourages its use and we did not use it
correctly anyway.

BP


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@16885 57a11ea4-9604-0410-9ed3-97b8803252fd

src/engine/SplitP.h

@@ -149,7 +149,7 @@ void  xaccFreeSplit (Split *split);    /* frees memory */
 Split * xaccSplitClone (const Split *s);
 
 Split *xaccDupeSplit (const Split *s);
-G_INLINE_FUNC void mark_split (Split *s);
+void mark_split (Split *s);
 
 void xaccSplitVoid(Split *split);
 void xaccSplitUnvoid(Split *split);