rework Identity API: no longer restricted to square matrices
diff --git a/test/miscmatrices.cpp b/test/miscmatrices.cpp
index 57d6f94..42f808b 100644
--- a/test/miscmatrices.cpp
+++ b/test/miscmatrices.cpp
@@ -51,7 +51,7 @@
   else VERIFY_IS_MUCH_SMALLER_THAN(square(r,r2), static_cast<Scalar>(1));
   square = MatrixType::zero(rows, rows);
   square.diagonal() = VectorType::ones(rows);
-  VERIFY_IS_APPROX(square, MatrixType::identity(rows));
+  VERIFY_IS_APPROX(square, MatrixType::identity(rows, rows));
 }
 
 void EigenTest::testMiscMatrices()