Fix repository test.

simgear/io/HTTPRepository.cxx

@@ -405,7 +405,8 @@ public:
 
     HTTPDirectory* childDirectory(const std::string& name)
     {
-        return _repository->getOrCreateDirectory(relativePath() + "/" + name);
+        std::string childPath = relativePath().empty() ? name : relativePath() + "/" + name;
+        return _repository->getOrCreateDirectory(childPath);
     }
 
     void removeOrphans(const string_list& orphans)

simgear/io/test_repository.cxx

@@ -256,6 +256,10 @@ public:
                 repoPath = repoPath.substr(0, suffix);
             }
 
+            if (repoPath.find("/") == 0) { // trim leading /
+                repoPath = repoPath.substr(1);
+            }
+
             TestRepoEntry* entry = global_repo->findEntry(repoPath);
             if (!entry) {
                 sendErrorResponse(404, false, "unknown repo path:" + repoPath);