message: Add version number fallback
diff: @@ -14,7 +14,12 @@ execute_process(
  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  OUTPUT_VARIABLE VERSION_STR
  OUTPUT_STRIP_TRAILING_WHITESPACE
  + RESULT_VARIABLE GITVER
  )
  +if(NOT GITVER EQUAL "0")
  + message(STATUS "No git version found. Falling back to empty version no")
  + set(VERSION_STR "0.0.0")
  +endif()
  message(STATUS "Version: ${VERSION_STR}")
  STRING(REGEX REPLACE v\([0-9]+\).[0-9]+.[0-9]+.*$ \\1 MAVSDK_VERSION_MAJOR "${VERSION_STR}")
  