TrigOutputHandling: cmake fix

Missing find_package for ROOT.

Trigger/TrigSteer/TrigOutputHandling/CMakeLists.txt

@@ -7,12 +7,13 @@ atlas_subdir( TrigOutputHandling )
 
 find_package( tdaq-common COMPONENTS eformat )
 find_package( Boost )
+find_package( ROOT )
 
 # Component(s) in the package:
 atlas_add_library( TrigOutputHandlingLib
                    src/*.cxx
                    PUBLIC_HEADERS TrigOutputHandling
-                   INCLUDE_DIRS ${TDAQ-COMMON_INCLUDE_DIRS}
+                   INCLUDE_DIRS ${TDAQ-COMMON_INCLUDE_DIRS} ${ROOT_INCLUDE_DIRS}
                    LINK_LIBRARIES ${TDAQ-COMMON_LIBRARIES} GaudiKernel AthViews AthenaBaseComps RootUtils TrigSteeringEvent TrigSerializeResultLib TrigConfData xAODTrigCalo xAODTrigRinger xAODTrigEgamma xAODEgamma xAODBTagging xAODTrigger xAODTracking xAODTrigMuon xAODMuon xAODTau xAODTrigBphys xAODTrigMissingET DecisionHandlingLib AthenaMonitoringKernelLib TrigPartialEventBuildingLib TrigSerializeTPLib AthContainersRoot TrigCompositeUtilsLib TrigCostMonitorMTLib
 		   PRIVATE_LINK_LIBRARIES ${ROOT_LIBRARIES} PathResolver )