fixed for missing pyamg
fixed for missing pyamg

olivierverdier/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,sfepy/sfepy,vlukes/sfepy,BubuLK/sfepy,olivierverdier/sfepy,RexFuzzle/sfepy,rc/sfepy,lokik/sfepy,olivierverdier/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,lokik/sfepy,lokik/sfepy,vlukes/sfepy,sfepy/sfepy,rc/sfepy,vlukes/sfepy,RexFuzzle/sfepy,sfepy/sfepy,lokik/sfepy,rc/sfepy