[gtk+] Use g_snprintf instead of snprintf.

[Ignacio Casal Quinteiro <icq src gnome org>]

commit b0f793c8e71b7d187a30a0010720ae53e7ac74ed
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Wed Aug 10 12:29:01 2016 +0200

    Use g_snprintf instead of snprintf.
    
    snprintf is not compatible with msvc.

 gtk/gtkscale.c      |    3 ++-
 gtk/gtkspinbutton.c |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index 8c2f797..895438c 100644
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -1934,7 +1934,8 @@ gtk_scale_real_get_layout_offsets (GtkScale *scale,
 }
 
 static gchar *
-weed_out_neg_zero (gchar *str, gint digits)
+weed_out_neg_zero (gchar *str,
+                   gint   digits)
 {
   if (str[0] == '-')
     {
diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index 452ed33..7ddaac6 100644
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -1116,7 +1116,8 @@ measure_string_width (PangoLayout *layout,
 }
 
 static gchar *
-weed_out_neg_zero (gchar *str, gint digits)
+weed_out_neg_zero (gchar *str,
+                   gint   digits)
 {
   if (str[0] == '-')
     {