Respect sticky posts in category requests

gistfile1.php

<?php

function putStickyOnTop( $posts ) {
	global $wp_query;

	if( $wp_query->is_category() ){
		$sticky_posts = get_option('sticky_posts');
		$num_posts = count( $posts );
		$sticky_offset = 0;
		//loop over posts and relocate stickies to the front
		for( $i = 0; $i<$num_posts; $i++){
			if( in_array( $posts[$i]->ID, $sticky_posts ) ){
				$sticky_post = $posts[$i];
				//remove sticky post from current position
				array_splice( $posts, $i, 1 );
				//move to front, after other stickies
				array_splice( $posts, $sticky_offset, 0, array( $sticky_post ) );
				//increment the sticky offset. the next sticky will be placed at this offset.
				$sticky_offset++;
				//remove post from sticky posts array
				$offset = array_search( $sticky_post->ID, $sticky_posts );
				unset( $sticky_posts[$offset] );
			}
		}
	
	}

	return $posts;
}
add_filter('the_posts', 'putStickyOnTop' );