[cogl/cogl-1.18] atlas: make zero size a programmer error

[Robert Bragg <rbragg src gnome org>]

commit 46f52396643ef821c083bd341a55315f3683d17a
Author: Robert Bragg <robert linux intel com>
Date:   Sun Jun 23 21:06:48 2013 +0100

    atlas: make zero size a programmer error
    
    Instead of throwing a CoglError exception if an application tries to
    allocate a zero size atlas texture this make that a programmer error
    instead.
    
    Reviewed-by: Neil Roberts <neil linux intel com>
    (cherry picked from commit d3eaeedc86d408669b81d6c43ef2b0ab9d859c85)

 cogl/cogl-atlas-texture.c |   11 ++---------
 1 files changed, 2 insertions(+), 9 deletions(-)
---
diff --git a/cogl/cogl-atlas-texture.c b/cogl/cogl-atlas-texture.c
index 98d61ca..5e2fd96 100644
--- a/cogl/cogl-atlas-texture.c
+++ b/cogl/cogl-atlas-texture.c
@@ -655,15 +655,8 @@ cogl_atlas_texture_new_with_size (CoglContext *ctx,
   CoglAtlasTexture *atlas_tex;
 
   /* We can't atlas zero-sized textures because it breaks the atlas
-     data structure */
-  if (width < 1 || height < 1)
-    {
-      _cogl_set_error (error,
-                       COGL_TEXTURE_ERROR,
-                       COGL_TEXTURE_ERROR_SIZE,
-                       "1x1 atlas textures not supported");
-      return NULL;
-    }
+   * data structure */
+  _COGL_RETURN_VAL_IF_FAIL (width > 0 && height > 0, NULL);
 
   /* If we can't use FBOs then it will be too slow to migrate textures
      and we shouldn't use the atlas */