No warning when matrix size is inconsistent

[bulygin]

I noticed that no warning (or error) message is output when one creates a matrix which size is not compatible with a defining list on the right hand size. The following code show the problem:

> ring r=0,x,dp;
> // suppose I made a misprint and "2" should be "3" below
> matrix m[2][3]=1,0,0,0,1,0,0,0,1; // RHS is a 3x3 matrix
> print(m); // m is 2x3 matrix
1,0,0,
0,1,0
> // the same with "4"
> matrix m2[4][3]=1,0,0,0,1,0,0,0,1;
> print(m); // m is 4x3 matrix
1,0,0,
0,1,0,
0,0,1,
0,0,0

So if the number of elemets N in a matrix that is being defined is less than the list size L on the right, then simply first N entries of the list are taken. Next, if N>L, then the list is (with no notice) appended with zeroes.

This is may be a good thing to do by default, but I guess at least a warning message should be displayed, saying that defined dimensions and the defining list size do not match. Otherwise, if the code is involved enough, the user may work with incorrect matrices -- the effect not so easily found sometimes.

[hannes]

fix with revision 14055: a warning will be displayed if option(warn) is active.