Ensure the PRMan shadeop gets a .so extension on OSX

Author: robpieke

src/demos/rman/CMakeLists.txt

@@ -21,7 +21,7 @@ STRING(COMPARE EQUAL "${RMANTREE_TEST}" "" RMAN_SET)
 IF(NOT ${RMAN_SET})
 include_directories($ENV{RMANTREE}/include)
 link_directories($ENV{RMANTREE}/lib)
-add_library(SeExprOp SHARED seop.cpp)
+add_library(SeExprOp MODULE seop.cpp)
 target_link_libraries(SeExprOp prman ${SEEXPR_LIBRARIES})
 FILE(GLOB ribs "*.rib")
 install (TARGETS SeExprOp DESTINATION ${CMAKE_INSTALL_LIBDIR}/prman)