Fix compiler warning (uninitialized variable).

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1790 7894878c-1315-0410-8ee3-d5d059ff63e0

prog/dump/i2cset.c

@@ -26,6 +26,8 @@
 #include <fcntl.h>
 #include "i2c-dev.h"
 
+void help(void) __attribute__ ((noreturn));
+
 void help(void)
 {
   FILE *fptr;