Fix an error in treating the zero

Author: u-235

cmake/get-version.cmake

@@ -8,23 +8,23 @@ cmake_minimum_required(VERSION 3.9)
 file(READ ${CMAKE_SOURCE_DIR}/src/version.h VERSION_H)
 
 string(REGEX MATCH "#define[ \t]*APP_VERSION_MAJOR[ \t]*([0-9]*)" _ ${VERSION_H})
-if (CMAKE_MATCH_1)
+if (CMAKE_MATCH_COUNT)
     set(PROJECT_VERSION_MAJOR ${CMAKE_MATCH_1})
     set(PROJECT_VERSION ${CMAKE_MATCH_1})
 else ()
     return()
 endif ()
 
 string(REGEX MATCH "#define[ \t]*APP_VERSION_MINOR[ \t]*([0-9]*)" _ ${VERSION_H})
-if (CMAKE_MATCH_1)
+if (CMAKE_MATCH_COUNT)
     set(PROJECT_VERSION_MINOR ${CMAKE_MATCH_1})
     string(APPEND PROJECT_VERSION .${CMAKE_MATCH_1})
 else ()
     return()
 endif ()
 
 string(REGEX MATCH "#define[ \t]*APP_VERSION_PATCH[ \t]*([0-9]*)" _ ${VERSION_H})
-if (CMAKE_MATCH_1)
+if (CMAKE_MATCH_COUNT)
     set(PROJECT_VERSION_PATCH ${CMAKE_MATCH_1})
     string(APPEND PROJECT_VERSION .${CMAKE_MATCH_1})
 endif ()