fix shape checking in CSurfaceMapping.integrate()
fix shape checking in CSurfaceMapping.integrate()

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