cmake: better version conversion

CMakeLists.txt

@@ -105,11 +105,11 @@ if(GIT_FOUND AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git")
 		string(REGEX REPLACE "[Vv]" "" MS_VERSION ${GIT_VERSION})
 		string(REPLACE "-" "." MS_VERSION ${MS_VERSION})
 		string(REGEX REPLACE "\.g[0-9a-f]+" "" MS_VERSION ${MS_VERSION})
-		string(REGEX MATCH "[0-9]+\.[0-9]+\.[0-9]+" VERSION_3PARTS ${MS_VERSION})
-		string(REGEX MATCH "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+" VERSION_4PARTS ${MS_VERSION})
-		if(VERSION_3PARTS STREQUAL "")
+		string(REGEX MATCHALL "[0-9]+" VERSION_PARTS ${MS_VERSION})
+		list(LENGTH VERSION_PARTS VERSION_PARTS_LENGTH)
+		if(VERSION_PARTS_LENGTH EQUAL 2)
 			string(APPEND MS_VERSION ".0.0")
-		elseif(VERSION_4PARTS STREQUAL "")
+		elseif(VERSION_PARTS_LENGTH EQUAL 3)
 			string(APPEND MS_VERSION ".0")
 		endif()
 	endif()