[gtksourceview] utils: prefer snprintf() over g_snprintf()

[Christian Hergert <chergert src gnome org>]

commit 8aea7848a3ded4d51e04c1da55a9f6b540b2c14f
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 24 11:40:59 2019 -0700

    utils: prefer snprintf() over g_snprintf()
    
    Calling g_snprintf() is much slower in a hot-loop than glibc snprintf()
    directly, so prefer that when we are on a platform that supports it.

 gtksourceview/gtksourceutils.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/gtksourceview/gtksourceutils.c b/gtksourceview/gtksourceutils.c
index e6a3ca98..9095aae5 100644
--- a/gtksourceview/gtksourceutils.c
+++ b/gtksourceview/gtksourceutils.c
@@ -588,7 +588,12 @@ _gtk_source_utils_int_to_string (guint         value,
                return fi.len;
        }
 
+#ifdef G_OS_WIN32
        fi.len = g_snprintf (fi.str, sizeof fi.str - 1, "%u", value);
+#else
+       /* Use snprintf() directly when possible to reduce overhead */
+       fi.len = snprintf (fi.str, sizeof fi.str - 1, "%u", value);
+#endif
        fi.str[fi.len] = 0;
        fi.value = value;