Merge pull request #2160 from JanthonAlyn/patch-1

Update configure.ac to Fixed autoreconf warning

configure.ac

@@ -737,7 +737,7 @@ fi
 
 # Checks for library functions.
 AM_GNU_GETTEXT([external])
-AM_GNU_GETTEXT_VERSION([0.18])
+AM_GNU_GETTEXT_VERSION([0.19])
 AC_FUNC_ERROR_AT_LINE
 AC_PROG_GCC_TRADITIONAL