[t:4758] Added printing to error log if trying to upgrade the log after a non-clean shutdown.

git-svn-id: file:///svn/toku/tokudb@42472 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/log_upgrade.c

@@ -112,6 +112,10 @@ verify_clean_shutdown_of_log_version(const char *log_dir, uint32_t version, LSN
     if (version < TOKU_LOG_VERSION)  {
         FOOTPRINT(1);
         r = verify_clean_shutdown_of_log_version_old(log_dir, last_lsn);
+	if (r != 0) {
+	    fprintf(stderr, "Cannot upgrade TokuDB version %d database.", version);
+	    fprintf(stderr, "  Previous improper shutdown detected.\n");
+	}
     }
     else {
         FOOTPRINT(2);