message: add ISPC v1.12.0 to working list, add fatal error if using v1.11.0
diff: ## ======================================================================== ##
  # ISPC versions to look for, in decending order (newest first)
  -set(ISPC_VERSION_WORKING "1.10.0" "1.9.2" "1.9.1")
  +set(ISPC_VERSION_WORKING "1.12.0" "1.10.0" "1.9.2" "1.9.1")
  list(GET ISPC_VERSION_WORKING -1 ISPC_VERSION_REQUIRED)
  if (NOT ISPC_EXECUTABLE)
  @@ -71,6 +71,10 @@ if(NOT ISPC_VERSION)
  mark_as_advanced(ISPC_EXECUTABLE)
  endif()
  +if ("${ISPC_VERSION}" STREQUAL "1.11.0")
  + message(FATAL_ERROR "ISPC v1.11.0 is incompatible with OSPRay.")
  +endif()
  +
  set(OSPRAY_ISPC_ADDRESSING 32 CACHE STRING "32 vs 64 bit addressing in ispc")
  set_property(CACHE OSPRAY_ISPC_ADDRESSING PROPERTY STRINGS 32 64)
  mark_as_advanced(OSPRAY_ISPC_ADDRESSING)
  