Update gammapkt.cc #7287

Job	Run time
classicmode_1d_3dgrid	4m 19s
classicmode_3d	8m 8s
kilonova_1d_1dgrid	4m 46s
kilonova_1d_3dgrid	5m 14s
kilonova_2d_2dgrid	6m 48s
kilonova_2d_2dgrid_barnesthermalisation	5m 44s
kilonova_2d_2dgrid_expansionopac	5m 17s
kilonova_2d_2dgrid_xcomgammaphotoion	5m 34s
kilonova_2d_3dgrid	7m 6s
nebular_1d_3dgrid	11m 43s
nebular_1d_3dgrid_limitbfest	13m 53s
classicmode_1d_3dgrid testmode ON	15m 36s
classicmode_3d testmode ON	22m 40s
kilonova_1d_1dgrid testmode ON	10m 38s
kilonova_1d_3dgrid testmode ON	11m 20s
kilonova_2d_2dgrid testmode ON	18m 19s
kilonova_2d_2dgrid_barnesthermalisation testmode ON	16m 48s
kilonova_2d_2dgrid_expansionopac testmode ON	14m 47s
kilonova_2d_2dgrid_xcomgammaphotoion testmode ON	15m 57s
kilonova_2d_3dgrid testmode ON	19m 38s
nebular_1d_3dgrid testmode ON	25m 33s
nebular_1d_3dgrid_limitbfest testmode ON	28m 13s
combine_checksums	17s
	4h 38m 18s

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