[gimp] libgimp: change ARG_OFFSET define in GimpSaveProcedure from 4 to 5

[Michael Natterer <mitch src gnome org>]

commit 1ef5f816aa953170b81e4feb62f313a121a93abd
Author: Michael Natterer <mitch gimp org>
Date:   Thu May 28 22:34:41 2020 +0200

    libgimp: change ARG_OFFSET define in GimpSaveProcedure from 4 to 5
    
    the procedure's signature changed which broke marshalling of
    additional arguments and creation of GimpProcedureConfig object.

 libgimp/gimpsaveprocedure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libgimp/gimpsaveprocedure.c b/libgimp/gimpsaveprocedure.c
index 9d94405292..c2032ab96b 100644
--- a/libgimp/gimpsaveprocedure.c
+++ b/libgimp/gimpsaveprocedure.c
@@ -142,7 +142,7 @@ gimp_save_procedure_install (GimpProcedure *procedure)
                                       priority);
 }
 
-#define ARG_OFFSET 4
+#define ARG_OFFSET 5
 
 static GimpValueArray *
 gimp_save_procedure_run (GimpProcedure        *procedure,