[PATCH setup] Fix an allocation length error

[Jon Turney]

Allow for the terminating null.
---
 archive.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/archive.cc b/archive.cc
index e4af4f7..1ceb355 100644
--- a/archive.cc
+++ b/archive.cc
@@ -173,7 +173,7 @@ archive::extract_file (archive * source, const std::string& 
prefixURL,
          break;
        case ARCHIVE_FILE_DIRECTORY:
          {
-           char *path = (char *) alloca (destfilename.size());
+           char *path = (char *) alloca (destfilename.size() + 1);
            strcpy (path, destfilename.c_str());
            while (path[0] && path[strlen (path) - 1] == '/')
              path[strlen (path) - 1] = 0;
-- 
2.21.0