look for zmq.h instead of zmq.hpp, which is apparently missing in some installs.

cmake/Modules/FindZeroMQ.cmake

@@ -25,7 +25,7 @@ IF(WIN32)
 ENDIF(WIN32)
 
 FIND_LIBRARY(ZEROMQ_LIBRARY
-	NAMES libzmq zmq 
+	NAMES libzmq zmq
     HINTS ${PC_LIBZMQ_LIBDIR} ${PC_LIBZMQ_LIBRARY_DIRS}
 	PATHS
 		${ZEROMQ_LIBRARIES}
@@ -40,7 +40,7 @@ FIND_LIBRARY(ZEROMQ_LIBRARY
 #  ENDIF(ZeroMQ_FRAMEWORKS AND NOT ZEROMQ_INCLUDE_DIR)
 
 FIND_PATH(ZEROMQ_INCLUDE_DIR
-	NAMES zmq.hpp
+	NAMES zmq.h
 	PATHS
 #		${ZEROMQ_FRAMEWORK_INCLUDES}
 		${ZEROMQ_INCLUDE_DIRS}