Western Gas Partners (PRNewsFoto/Western Gas Partners, LP) (PRNewsFoto/Western Gas Partners, LP)HOUSTON, April 17, 2018 /PRNewswire/ — Western Gas Partners, LP (NYSE: WES) announced today that the board of directors of its general partner declared a quarterly cash distribution of $0.9350 per unit for the first quarter of 2018. This distribution represents a 2-percent increase over…