Please describe the problem:
When using the gdk_pixbuf_loader widget, I noticed that certain images are not
loaded. I've found that it seems to occur when the image size is less than 1k. 

Steps to reproduce:
//Run this this with filename_of_small_image pointing to a file
//with a jpg under 1024k

GdkPixbufLoader *loader;
GdkPixbuf* pixbuf;
char* data;
int len=0;
FILE* icon_file=fopen(filename_of_small_image,"r");
while(!feof(icon_file)) data[len++]=fgetc(icon_file);


loader=gdk_pixbuf_loader_new();
gdk_pixbuf_loader_write(loader,data,len,&err);
//No area_prepared or area_updated signals get emitted. 
pixbuf=gdk_pixbuf_loader_get_pixbuf(loader);
//pixbuf will be null.


Actual results:
See comments.

Expected results:
I expect some signals to be emitted, and pixbuf to be non-null.

Does this happen every time?
Yes, whenever the file is under 1024  bytes.

Other information:
Workaround: pad the image with trailing 0's pushing it up to 1024 bytes in size.