[gthumb] cairo io: jxl: declare function as static, fixed style

[Paolo Bacchilega <paobac src gnome org>]

commit e8f5982ca98e3d265ae4c76e8bd4b12918796a4b
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Apr 5 11:24:37 2021 +0200

    cairo io: jxl: declare function as static, fixed style

 extensions/cairo_io/cairo-image-surface-jxl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/extensions/cairo_io/cairo-image-surface-jxl.c b/extensions/cairo_io/cairo-image-surface-jxl.c
index 264492be..00d75461 100644
--- a/extensions/cairo_io/cairo-image-surface-jxl.c
+++ b/extensions/cairo_io/cairo-image-surface-jxl.c
@@ -29,8 +29,12 @@
 #include <gthumb.h>
 #include "cairo-image-surface-jxl.h"
 
-void convert_pixels(int width, int height, guchar* buffer) {
-       int x, y;
+static void
+convert_pixels (int     width,
+               int     height,
+               guchar *buffer)
+{
+       int     x, y;
        guchar *p = buffer, r, g, b, a;
 
        for (y = 0; y < height; y++)