Fix the bug introduced by   commit d293c1bfbab69660683b07fd1fe3e0cc3cad570e     Replace calls to my_strcat and my_strcat with snprintf_add.
Fix the bug introduced by
  commit d293c1bfbab69660683b07fd1fe3e0cc3cad570e
    Replace calls to my_strcat and my_strcat with snprintf_add.

Note that my_strcat1() does nothing when the 4th parameter doesn't
have a valid value.

treasure-data/prestogres-odbc,gavioto/psqlodbc,hlinnaka/psqlodbc,treasure-data/prestogres-odbc,gavioto/psqlodbc,gavioto/psqlodbc,treasure-data/prestogres-odbc,hlinnaka/psqlodbc,hlinnaka/psqlodbc