DiagonalPrecond: fix potential segfault in case the diagonal contains explciit zeros

This commit is contained in:
Gael Guennebaud 2011-10-09 22:17:37 +02:00
parent 1beb8a6564
commit e97879857b

View File

@ -70,7 +70,7 @@ class DiagonalPreconditioner
{
typename MatrixType::InnerIterator it(mat,j);
while(it && it.index()!=j) ++it;
if(it.index()==j)
if(it && it.index()==j)
m_invdiag(j) = Scalar(1)/it.value();
else
m_invdiag(j) = 0;