COMP: fix otbIncludeDirectories for ITK include path

CMake/otbIncludeDirectories.cmake

@@ -126,7 +126,7 @@ IF(OTB_USE_EXTERNAL_ITK)
     ${ITK_INCLUDE_DIRS} )
 ELSE(OTB_USE_EXTERNAL_ITK)
 	IF(NOT ITK_INSTALL_INCLUDE_DIR)
-  		SET(ITK_INSTALL_INCLUDE_DIR "/include/otb/Utilities/ITK")
+  		SET(ITK_INSTALL_INCLUDE_DIR "include/otb/Utilities/ITK")
 	ENDIF(NOT ITK_INSTALL_INCLUDE_DIR)
 #         INCLUDE(${OTB_SOURCE_DIR}/Utilities/ITK/Utilities/itkThirdParty.cmake)
 #  	INCLUDE(${OTB_SOURCE_DIR}/Utilities/ITK/itkIncludeDirectories.cmake)