[gimp] Fix warn -Warray-parameter gflare_read_gradient_name gflare_write_gradient_name

[Jehan <jehanp src gnome org>]

commit 00984224253a4a65475d69e18743da3227537cd5
Author: Axel Viala <axel viala darnuria eu>
Date:   Tue Mar 29 16:49:56 2022 +0200

    Fix warn -Warray-parameter gflare_read_gradient_name gflare_write_gradient_name

 plug-ins/gradient-flare/gradient-flare.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/gradient-flare/gradient-flare.c b/plug-ins/gradient-flare/gradient-flare.c
index 708199830e..75159528d7 100644
--- a/plug-ins/gradient-flare/gradient-flare.c
+++ b/plug-ins/gradient-flare/gradient-flare.c
@@ -511,13 +511,13 @@ static void gflare_read_int             (gint         *intvar,
                                          GFlareFile   *gf);
 static void gflare_read_double          (gdouble      *dblvar,
                                          GFlareFile   *gf);
-static void gflare_read_gradient_name   (gchar        *name,
+static void gflare_read_gradient_name   (GradientName  name,
                                          GFlareFile   *gf);
 static void gflare_read_shape           (GFlareShape  *shape,
                                          GFlareFile   *gf);
 static void gflare_read_mode            (GFlareMode   *mode,
                                          GFlareFile   *gf);
-static void gflare_write_gradient_name  (gchar        *name,
+static void gflare_write_gradient_name  (GradientName  name,
                                          FILE         *fp);
 
 static gint calc_sample_one_gradient    (void);