lm_sensors: improved to only build sensord if rrdtool is effectively installed

base/lm_sensors/lm_sensors.conf

@@ -2,6 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../lm_sensors/lm_sensors.conf
+# Copyright (C) 2010 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 # Copyright (C) 1998 - 2003 Clifford Wolf
 #
@@ -18,7 +19,7 @@ var_remove makeinstopt " " "install"
 var_append makeinstopt " " "PREFIX=$root/$prefix user_install"
 var_append makeinstopt " " "LIBDIR=$root/$libdir"
 
-if pkginstalled rrdtool ; then
+if pkginstalled -f rrdtool ; then
 	var_append makeopt " " "PROG_EXTRA:=sensord"
 	var_append makeinstopt " " "PROG_EXTRA:=sensord"
 fi