Calling the styleProcessor callback with an error does not bubble up back into the stream

[gregjacobs]

gulp.src( myFiles )
    .pipe( ng2Template( {
        styleProcessor: function( path, ext, file, callback ) {
            callback( 'my-error' );  // should emit error to stream
        } )
    } ) )
    .on( 'error', function( err ) { 
        console.log( "I'm never called" );
    } );

[gregjacobs]

This is needed to implement proper error handling in our incremental builds btw