FIX remove none space space in last commit

FIX interval was not compilable due to rename to scalar_traits
CHANGE interval handling to use general abs/sqrt from last commit


[SVN r35519]

libs/numeric/ublas

@@ -1 +1 @@
-Subproject commit 757aacfb680d87035f80d97c260193023ca4418c
+Subproject commit 18d22622d94ca6b3ad66301d1676fad2a1b9d06d