Fix error in the manpage file name.

doc/CMakeLists.txt

@@ -8,7 +8,7 @@ if(UNIX AND NOT APPLE)
 	message(STATUS "Going to generate the man pages.")
 
 	execute_process(COMMAND docbook-to-man xtpcpp.xml
-		OUTPUT_FILE	${CMAKE_BINARY_DIR}/xtpcpp
+		OUTPUT_FILE	${CMAKE_BINARY_DIR}/xtpcpp.1
 		WORKING_DIRECTORY	${CMAKE_CURRENT_SOURCE_DIR})
 
 endif(UNIX AND NOT APPLE)
@@ -23,8 +23,8 @@ message("Installing the doc files in ${DOC_DIR}")
 
 # The man page.
 if(UNIX AND NOT APPLE)
-	install(FILES ${CMAKE_BINARY_DIR}/xtpcpp
-		${CMAKE_BINARY_DIR}/xtpcpp
+	install(FILES ${CMAKE_BINARY_DIR}/xtpcpp.1
+		${CMAKE_BINARY_DIR}/xtpcpp.1
 		DESTINATION ${CMAKE_INSTALL_PREFIX}/share/man/man1)
 endif()