Commented out duplicated function def.

changed <ctime> to <time.h> as clock and clock_t are used without std:: qualifiers


[SVN r13294]

libs/graph

@@ -1 +1 @@
-Subproject commit a78fe97664e65bdb4a3fb03a280f9a117a298989
+Subproject commit 76054ca8bef4f834253ce88da7f3fe5f83560b12