Modify version number for next release

Author: Atsushi Abe

configure.ac

@@ -36,7 +36,7 @@
 dnl
 dnl LTFS configure.ac.
 dnl
-AC_INIT([LTFS], [2.4.5.0 (10502)], IBM corporation.)
+AC_INIT([LTFS], [2.4.5.1 (Prelim)], IBM corporation.)
 AC_CONFIG_SRCDIR([src/main.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIRS([m4])