graphics/opencolorio: fix build for graphics/opencolorio-tools

Patch out broken and unneeded OpenEXR/half.h detection.

Approved by:	portmgr blanket

graphics/opencolorio/files/patch-share_cmake_OCIOMacros.cmake

@@ -1,6 +1,34 @@
---- share/cmake/OCIOMacros.cmake.orig	2015-08-29 00:58:36 UTC
+--- share/cmake/OCIOMacros.cmake.orig	2019-03-28 05:12:57 UTC
 +++ share/cmake/OCIOMacros.cmake
-@@ -168,7 +168,7 @@ MACRO(OCIOFindPython)
+@@ -96,27 +96,6 @@ MACRO(OCIOFindOpenImageIO)
+         set(OIIO_FOUND TRUE)
+         message(STATUS "Found OIIO library ${OIIO_LIBRARIES}")
+         message(STATUS "Found OIIO includes ${OIIO_INCLUDES}")
+-
+-        # Unfortunately, OIIO hides a dependency to Ilmbase includes
+-
+-        if(ILMBASE_PATH)
+-            message(STATUS "Ilmbase path explicitly specified: ${ILMBASE_PATH}")
+-        endif()
+-
+-        FIND_PATH( ILMBASE_INCLUDES OpenEXR/half.h
+-            ${ILMBASE_PATH}/include/
+-            /usr/include
+-            /usr/local/include
+-            /sw/include
+-            /opt/local/include
+-            DOC "The directory where OpenEXR/half.h resides")
+-
+-        if(ILMBASE_INCLUDES)
+-            message(STATUS "Found Ilmbase includes ${ILMBASE_INCLUDES}")
+-        else()
+-            set(OIIO_FOUND FALSE)
+-            message(STATUS "Ilmbase not found. Specify ILMBASE_PATH to locate it")
+-        endif()
+     else()
+         set(OIIO_FOUND FALSE)
+         message(STATUS "OIIO not found. Specify OIIO_PATH to locate it")
+@@ -222,7 +201,7 @@ MACRO(OCIOFindPython)
          file(TO_CMAKE_PATH "${PYTHON_LIBRARY_DIRS_RAW}" PYTHON_LIBRARY_DIRS)
  
          FIND_LIBRARY(PYTHON_LIBRARY