[gnumeric] Compilation: fix warning.

[Morten Welinder <mortenw src gnome org>]

commit d5a6836f96612e8ba9566a5a1bb2d79ebc8a2366
Author: Morten Welinder <terra gnome org>
Date:   Sat Dec 2 16:48:51 2017 -0500

    Compilation: fix warning.
    
    There is no reason why scrollbar_config should not change the scg.
    We, in fact, do so make it obvious.

 src/sheet-control-gui.c  |    3 ++-
 src/sheet-control-priv.h |    2 +-
 src/sheet-control.c      |    2 +-
 src/sheet-control.h      |    2 +-
 4 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/src/sheet-control-gui.c b/src/sheet-control-gui.c
index ecd2286..f56ff1d 100644
--- a/src/sheet-control-gui.c
+++ b/src/sheet-control-gui.c
@@ -521,8 +521,9 @@ scg_scrollbar_config_real (SheetControl const *sc)
 
 
 static void
-scg_scrollbar_config (SheetControlGUI *scg)
+scg_scrollbar_config (SheetControl *sc)
 {
+       SheetControlGUI *scg = GNM_SCG (sc);
        /* See bug 789412 */
        if (!scg->scroll_bar_timer)
                scg->scroll_bar_timer =
diff --git a/src/sheet-control-priv.h b/src/sheet-control-priv.h
index b151256..8c7c659 100644
--- a/src/sheet-control-priv.h
+++ b/src/sheet-control-priv.h
@@ -24,7 +24,7 @@ typedef struct {
                                         GnmRange const * r);
        void (*ant)                     (SheetControl *sc);
        void (*unant)                   (SheetControl *sc);
-       void (*scrollbar_config)        (SheetControl const *sc);
+       void (*scrollbar_config)        (SheetControl *sc);
        void (*mode_edit)               (SheetControl *sc);
        void (*set_top_left)            (SheetControl *sc, int col, int row);
        void (*recompute_visible_region)(SheetControl *sc,
diff --git a/src/sheet-control.c b/src/sheet-control.c
index fa69f8e..1e23806 100644
--- a/src/sheet-control.c
+++ b/src/sheet-control.c
@@ -116,7 +116,7 @@ SC_VIRTUAL (redraw_headers,
 SC_VIRTUAL (ant, (SheetControl *sc), (sc))
 SC_VIRTUAL (unant, (SheetControl *sc), (sc))
 
-SC_VIRTUAL (scrollbar_config, (SheetControl const *sc), (sc))
+SC_VIRTUAL (scrollbar_config, (SheetControl *sc), (sc))
 
 SC_VIRTUAL (mode_edit, (SheetControl *sc), (sc))
 
diff --git a/src/sheet-control.h b/src/sheet-control.h
index 571d8cd..11ae40c 100644
--- a/src/sheet-control.h
+++ b/src/sheet-control.h
@@ -32,7 +32,7 @@ void sc_redraw_headers                (SheetControl *sc,
 void sc_ant                    (SheetControl *sc);
 void sc_unant                  (SheetControl *sc);
 
-void sc_scrollbar_config       (SheetControl const *sc);
+void sc_scrollbar_config       (SheetControl *sc);
 
 void sc_mode_edit              (SheetControl *sc);