[gdk-pixbuf] TGA: assert and assume that the module callbacks are non-NULL

[Emmanuele Bassi <ebassi src gnome org>]

commit 2cb97be60792fc50dc636575fce1a7ae46865f79
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Nov 28 19:15:05 2017 -0600

    TGA: assert and assume that the module callbacks are non-NULL

 gdk-pixbuf/io-tga.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)
---
diff --git a/gdk-pixbuf/io-tga.c b/gdk-pixbuf/io-tga.c
index f5ba958fa..52eb0d66b 100644
--- a/gdk-pixbuf/io-tga.c
+++ b/gdk-pixbuf/io-tga.c
@@ -234,9 +234,6 @@ tga_emit_update (TGAContext *ctx)
   gint width = gdk_pixbuf_get_width (ctx->pbuf);
   gint height = gdk_pixbuf_get_height (ctx->pbuf);
 
-  if (!ctx->updated_func)
-    return;
-
   /* We only notify row-by-row for now.
    * I was too lazy to handle line-breaks.
    */
@@ -357,13 +354,13 @@ static gboolean fill_in_context(TGAContext *ctx, GError **err)
        w = LE16(ctx->hdr->width);
        h = LE16(ctx->hdr->height);
 
-       if (ctx->size_func) {
+       {
                gint wi = w;
                gint hi = h;
-               
+
                (*ctx->size_func) (&wi, &hi, ctx->user_data);
-               
-               if (wi == 0 || hi == 0) 
+
+               if (wi == 0 || hi == 0)
                        return FALSE;
        }
 
@@ -629,8 +626,7 @@ tga_load_header (TGAContext  *ctx,
   if (!fill_in_context(ctx, err))
           return FALSE;
 
-  if (ctx->prepared_func)
-          (*ctx->prepared_func) (ctx->pbuf, NULL, ctx->user_data);
+  (*ctx->prepared_func) (ctx->pbuf, NULL, ctx->user_data);
 
   ctx->process = tga_read_info;
   return TRUE;
@@ -643,6 +639,10 @@ static gpointer gdk_pixbuf__tga_begin_load(GdkPixbufModuleSizeFunc size_func,
 {
        TGAContext *ctx;
 
+       g_assert (size_func != NULL);
+       g_assert (prepared_func != NULL);
+       g_assert (updated_func != NULL);
+
        ctx = g_try_malloc(sizeof(TGAContext));
        if (!ctx) {
                g_set_error_literal(err, GDK_PIXBUF_ERROR,