PBXT fixes.

 - Silence a compiler warning.
 - Don't build pbms object files now that we disabled pbms.


storage/pbxt/src/Makefile.am:
  We disabled PBMS, so don't build it.
storage/pbxt/src/datalog_xt.cc:
  Silence a warning about signed/unsigned comparison.

storage/pbxt/src/Makefile.am

@@ -30,7 +30,7 @@ libpbxt_la_SOURCES =	bsearch_xt.cc cache_xt.cc ccutils_xt.cc database_xt.cc \
 						datadic_xt.cc datalog_xt.cc filesys_xt.cc hashtab_xt.cc \
 						ha_pbxt.cc heap_xt.cc index_xt.cc linklist_xt.cc \
 						memory_xt.cc myxt_xt.cc pthread_xt.cc restart_xt.cc \
-						pbms_enabled.cc sortedlist_xt.cc strutil_xt.cc \
+						sortedlist_xt.cc strutil_xt.cc \
 						tabcache_xt.cc table_xt.cc trace_xt.cc thread_xt.cc \
 						systab_xt.cc ha_xtsys.cc discover_xt.cc \
 						util_xt.cc xaction_xt.cc xactlog_xt.cc lock_xt.cc locklist_xt.cc
@@ -49,4 +49,4 @@ libpbxt_a_SOURCES =		$(libpbxt_la_SOURCES)
 libpbxt_a_CXXFLAGS =	$(AM_CXXFLAGS)
 libpbxt_a_CFLAGS =		$(AM_CFLAGS) -std=c99
 
-EXTRA_DIST =			CMakeLists.txt
+EXTRA_DIST =			CMakeLists.txt pbms_enabled.cc

storage/pbxt/src/datalog_xt.cc

@@ -410,7 +410,7 @@ static void dl_recover_log(XTThreadPtr self, XTDatabaseHPtr db, XTDataLogFilePtr
 	ASSERT_NS(seq_read.sl_log_eof == seq_read.sl_rec_log_offset);
 	data_log->dlf_log_eof = seq_read.sl_rec_log_offset;
 
-	if (data_log->dlf_log_eof < sizeof(XTXactLogHeaderDRec)) {
+	if ((size_t) data_log->dlf_log_eof < sizeof(XTXactLogHeaderDRec)) {
 		data_log->dlf_log_eof = sizeof(XTXactLogHeaderDRec);
 		if (!dl_create_log_header(data_log, seq_read.sl_log_file, self))
 			xt_throw(self);