Tweak R CMD check to treat loadNamespace("pkg") as use of the package

(PR#18466). From Duncan Murdoch.


git-svn-id: https://svn.r-project.org/R/trunk@88502 00db46b3-68df-0310-9c12-caf00c1e9a41

Author: kalibera

src/library/tools/R/QC.R

@@ -6094,6 +6094,7 @@ function(package, dir, lib.loc = NULL)
                     ## and is in e.g. R.oo
                     if(!dunno) {
                         pkg <- as.character(pkg)
+                        all_imports <<- c(all_imports, pkg)
                         if(Call %in% c("loadNamespace",
                                        "requireNamespace")) {
                             if(pkg %notin%