Misc cleanups, missing extensions of integral types to (un)signed char

and, where apropriate, the long long types.


[SVN r33877]

libs/concept_check

@@ -1 +1 @@
-Subproject commit 3bce136d94c0e10a67ada008b3dde9f5cb546f4e
+Subproject commit 80cbd761890c89fd285a76f85e7ba2863ddac8e2