see #3108, fixed a simple problem in symmetric.hpp (thx Michael), the storage layout still need more investigation.

[SVN r54232]

libs/numeric/ublas

@@ -1 +1 @@
-Subproject commit d2f9d354ccc6e88e33990935266a26a735e5a36c
+Subproject commit e02894e635970005a9b3895adb98b603df136314