--- a/scripts/ChangeLog
+++ b/scripts/ChangeLog
@@ -1,3 +1,11 @@
+2002-11-04  Nicholas Piper <nick-octave@nickpiper.co.uk>
+
+	* control/base/lsim.m: Correct doc string.
+
+2002-11-04  A S Hodel <a.s.hodel@Eng.Auburn.EDU>
+
+	* control/system/syssub.m: Call tf2sys with Gnum-Hnum, not Gnum+Hnum.
+
 2002-11-01  John W. Eaton  <jwe@bevo.che.wisc.edu>
 
 	* plot/contour.m: Handle x and y as matrices too.

--- a/scripts/control/base/lsim.m
+++ b/scripts/control/base/lsim.m
@@ -22,8 +22,8 @@
 ##
 ## Produces a plot for the output of the system, sys.
 ##
-## U is an array that contains the system's inputs.  Each column in u
-## corresponds to a different time step.  Each row in u corresponds to a
+## U is an array that contains the system's inputs.  Each row in u
+## corresponds to a different time step.  Each column in u corresponds to a
 ## different input.  T is an array that contains the time index of the
 ## system.  T should be regularly spaced.  If initial conditions are required
 ## on the system, the x0 vector should be added to the argument list.

--- a/scripts/control/system/syssub.m
+++ b/scripts/control/system/syssub.m
@@ -80,7 +80,7 @@
       [Hnum,Hden,HT,Hin,Hout] = sys2tf(Hsys);
       if(length(Hden) == length(Gden) )
         if( (Hden == Gden) & (HT == GT) )
-          sys = tf2sys(Gnum+Hnum,Gden,GT,Gin,Gout);
+          sys = tf2sys(Gnum-Hnum,Gden,GT,Gin,Gout);
           return
         endif
         ## if not, we go on and do the usual thing...

--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,11 @@
+2002-11-04  John W. Eaton  <jwe@bevo.che.wisc.edu>
+
+	* cutils.c (octave_vsnprintf): Handle C99 snprintf semantics.
+
+	* oct-obj.h (octave_value_list::operator =): Copy names too.
+	(octave_value_list::octave_value_list (const octave_value_list&)):
+	Likewise.
+
 2002-11-01  John W. Eaton  <jwe@bevo.che.wisc.edu>
 
 	* version.h (OCTAVE_VERSION): Now 2.1.39.

--- a/src/cutils.c
+++ b/src/cutils.c
@@ -122,6 +122,10 @@
 // We manage storage.  User should not free it, and its contents are
 // only valid until next call to vsnprintf.
 
+#if defined __GNUC__ && __GNUC__ >= 3
+#define HAVE_C99_VSNPRINTF 1
+#endif
+
 char *
 octave_vsnprintf (const char *fmt, va_list args)
 {
@@ -130,21 +134,47 @@
 
   static char *buf = 0;
 
+  int nchars;
+
   if (! buf)
     buf = malloc (size);
 
+#if defined (HAVE_C99_VSNPRINTF)
+
+  nchars = vsnprintf (buf, size, fmt, args);
+
+  if (nchars >= size)
+    {
+      size = nchars + 1;
+      buf = realloc (buf, size);
+
+      if (buf)
+	vsnprintf (buf, size, fmt, args);
+
+      return buf;
+    }
+
+#else
+
   while (1)
     {
-      int nchars = vsnprintf (buf, size, fmt, args);
+      nchars = vsnprintf (buf, size, fmt, args);
 
       if (nchars > -1)
 	return buf;
       else
 	{
 	  size *= 2;
+
 	  buf = realloc (buf, size);
+
+	  if (! buf)
+	    return 0;
 	}
     }
+
+#endif
+
 #else
   return 0;
 #endif

--- a/src/oct-obj.h
+++ b/src/oct-obj.h
@@ -95,7 +95,7 @@
     : data (1, octave_value (r)) { }
 
   octave_value_list (const octave_value_list& obj)
-    : data (obj.data) { }
+    : data (obj.data), names (obj.names) { }
 
   void *operator new (size_t size)
     { return allocator.alloc (size); }
@@ -106,7 +106,10 @@
   octave_value_list& operator = (const octave_value_list& obj)
     {
       if (this != &obj)
-	data = obj.data;
+	{
+	  data = obj.data;
+	  names = obj.names;
+	}
 
       return *this;
     }