STEPHEN HARVEY: FLIGHTS Gallery Schlesinger until December 17 (24 E. 73rd Street, Second Floor, between Fifth and Madison Avenues, 212-734-3600). GWEN HARDIE: FACE PAINTINGS 2005 Dinter Fine Art until December 23 (547 W. 27th Street, between Tenth and Eleventh Avenues, 212-947-2818). RICHARD WALKER: BEACON ROAD PAINTINGS Alexandre Gallery until December 30 (41 E. 57th Street, … Continued