perl.c: Add missing cast

Commit b95d23342a119c6677aa5ad786ca7d002c98bef2 would not compile under
some options.

1 files changed, 1 insertions, 1 deletions

diff --git a/perl.c b/perl.c
index b3e16c0eaf..254577e91d 100644
--- a/perl.c
+++ b/perl.c
@@ -1610,7 +1610,7 @@ dup_environ(pTHX)
 
     for (size_t i = 0, copied = 0; n_entries > i; ++i) {
         size_t len = strlen(environ[i]) + 1;
-        new_environ[i] = CopyD(environ[i], vars + copied, len, char);
+        new_environ[i] = (char *) CopyD(environ[i], vars + copied, len, char);
         copied += len;
     }
     new_environ[n_entries] = NULL;