From: Frank Mori Hess <fmhess@speakeasy.net>
Date: Wed, 18 Jun 2003 00:06:20 +0000 (+0000)
Subject: fix possible segfault
X-Git-Tag: r0_7_21~77
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=04582261ab6f294f602c023270067ce46d8fc01f;p=comedilib.git

fix possible segfault
---

diff --git a/comedi_calibrate/comedi_calibrate.c b/comedi_calibrate/comedi_calibrate.c
index 117dc44..7cea71f 100644
--- a/comedi_calibrate/comedi_calibrate.c
+++ b/comedi_calibrate/comedi_calibrate.c
@@ -1591,13 +1591,16 @@ double fractional_offset( calibration_setup_t *setup, int subdevice,
 	unsigned int channel, unsigned int range, int obs )
 {
 	comedi_range *range_ptr;
-	double target = setup->observables[obs].target;
+	double target;
 	double reading;
-	unsigned int chanspec = setup->observables[obs].observe_insn.chanspec;
+	unsigned int chanspec;
 	new_sv_t sv;
 
 	if( subdevice < 0 || obs < 0 ) return 0.0;
 
+	chanspec = setup->observables[obs].observe_insn.chanspec;
+	target = setup->observables[obs].target;
+
 	range_ptr = comedi_get_range( setup->dev, subdevice, channel, range );
 	assert( range_ptr != NULL );