[build] include config.h conditionally to not break non-autotools build.

[ginac.git] / ginac / polynomial / mgcd.cpp

diff --git a/ginac/polynomial/mgcd.cpp b/ginac/polynomial/mgcd.cpp
index 7500805e4129cdf008226b50702c3ed39465fbf8..9eb535aff1dfad2e53e4e89e59a3bbaec5e8a930 100644 (file)
--- a/ginac/polynomial/mgcd.cpp
+++ b/ginac/polynomial/mgcd.cpp
@@ -3,7 +3,7 @@
  *  Chinese remainder algorithm. */
 
 /*
- *  GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2011 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -40,6 +40,7 @@ static cln::cl_I extract_integer_content(ex& Apr, const ex& A)
 {
        static const cln::cl_I n1(1);
        const numeric icont_ = A.integer_content();
+       GINAC_ASSERT(cln::instanceof(icont_.to_cl_N(), cln::cl_RA_ring));
        if (cln::instanceof(icont_.to_cl_N(), cln::cl_I_ring)) {
                const cln::cl_I icont = cln::the<cln::cl_I>(icont_.to_cl_N());
                if (icont != 1) {
@@ -49,14 +50,12 @@ static cln::cl_I extract_integer_content(ex& Apr, const ex& A)
                        Apr = A;
                        return n1;
                }
-       }
-       if (cln::instanceof(icont_.to_cl_N(), cln::cl_RA_ring)) {
+       } else {
                Apr = (A/icont_).expand();
                // A is a polynomail over rationals, so GCD is defined
                // up to arbitrary rational number.
                return n1;
        }
-       GINAC_ASSERT(NULL == "expected polynomial over integers or rationals");
 }
 
 ex chinrem_gcd(const ex& A_, const ex& B_, const exvector& vars)
@@ -101,7 +100,7 @@ ex chinrem_gcd(const ex& A_, const ex& B_, const exvector& vars)
                Cp = (Cp*numeric(nlc)).expand().smod(pnum);
                exp_vector_t cp_deg = degree_vector(Cp, vars);
                if (zerop(cp_deg))
-                       return numeric(g_lc);
+                       return numeric(c);
                if (zerop(q)) {
                        H = Cp;
                        n = cp_deg;