dmx: add missing include #2659

Job	Run time
Template generation (score-avnd-simple-template)	22s
Template generation (score-vfx-template)	21s
Template generation (score-process-template)	1m 8s
Template generation (score-device-template)	16s
Template generation (score-offline-process-template)	22s
score-vfx-template (Windows)	8m 35s
score-process-template (Windows)	9m 0s
score-device-template (Windows)	8m 40s
score-avnd-simple-template (Windows)	8m 28s
score-offline-process-template (Windows)	7m 53s
score-vfx-template (Ubuntu)	3m 5s
score-process-template (Ubuntu)	5m 24s
score-device-template (Ubuntu)	5m 26s
score-avnd-simple-template (Ubuntu)	5m 8s
score-offline-process-template (Ubuntu)	2m 11s
score-vfx-template (macOS)	6m 8s
score-process-template (macOS)	5m 42s
score-device-template (macOS)	5m 11s
score-avnd-simple-template (macOS)	5m 27s
score-offline-process-template (macOS)	5m 31s
	1h 34m 18s

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