[retro-gtk] glsl-shader: Initialize some variables

[Alexander Mikhaylenko <alexm src gnome org>]

commit 24d2be0af072765b80d6fb241392b3b8913bd5d6
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Oct 31 16:17:45 2020 +0100

    glsl-shader: Initialize some variables
    
    While they likely weren't causing any issue, this makes the code cleaner
    and possibly safer.

 retro-gtk/retro-glsl-shader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/retro-gtk/retro-glsl-shader.c b/retro-gtk/retro-glsl-shader.c
index f03ca581..51eb1485 100644
--- a/retro-gtk/retro-glsl-shader.c
+++ b/retro-gtk/retro-glsl-shader.c
@@ -42,7 +42,7 @@ create_shader (GBytes  *source_bytes,
   glGetShaderiv (shader, GL_COMPILE_STATUS, &status);
   if (status == GL_FALSE) {
     g_autofree gchar *buffer = NULL;
-    gint log_length;
+    gint log_length = 0;
 
     glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &log_length);
     buffer = g_malloc (log_length + 1);
@@ -134,8 +134,8 @@ retro_glsl_shader_new (GBytes  *vertex,
 
   glGetProgramiv (self->program, GL_LINK_STATUS, &status);
   if (status == GL_FALSE) {
+    g_autofree gchar *buffer = NULL;
     gint log_length = 0;
-    g_autofree gchar *buffer;
 
     glGetProgramiv (self->program, GL_INFO_LOG_LENGTH, &log_length);
     buffer = g_malloc (log_length + 1);