Fix arguments passing in pod2man.cmake

pod2man causes too many troubles

cmake/pod2man.cmake

@@ -18,8 +18,8 @@ macro(pod2man PODFILE NAME SECTION CENTER)
     if(POD2MAN)
         add_custom_command(
             OUTPUT ${MANFILE_FULL}
-            COMMAND ${POD2MAN} --section ${SECTION} --center ${CENTER}
-                --release --name ${NAME} ${PODFILE_FULL} ${MANFILE_FULL}
+            COMMAND ${POD2MAN} --section="${SECTION}" --center="${CENTER}"
+                --release --name="${NAME}" "${PODFILE_FULL}" "${MANFILE_FULL}"
         )
         set(MANPAGE_TARGET "man-${NAME}")
         add_custom_target(${MANPAGE_TARGET} ALL