Index: trunk/psLib/src/math/psPolynomialMD.h
===================================================================
--- trunk/psLib/src/math/psPolynomialMD.h	(revision 16934)
+++ trunk/psLib/src/math/psPolynomialMD.h	(revision 16944)
@@ -15,5 +15,5 @@
 /// Assertion for valid polynomial
 #define PS_ASSERT_POLYNOMIALMD_NON_NULL(POLY, RETURN) \
-    if (!(POLY) || (POLY)->dim <= 0 || !(POLY)->orders || (POLY)->orders->n != (POLY)->dim || \
+    if (!(POLY) || (POLY)->dim < 0 || !(POLY)->orders || (POLY)->orders->n != (POLY)->dim || \
         !(POLY)->coeff) { \
         psError(PS_ERR_UNEXPECTED_NULL, true, "Invalid polynomial."); \