textconv: use shell to run helper

diff --git a/diff.c b/diff.c
index 08bbd3e9070996b38f4d34cedf7640d93aa5808d..4af7c3f9257a32ce694ff3dc902fe0aa71d4820b 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -3771,6 +3771,7 @@ static char *run_textconv(const char *pgm, struct diff_filespec *spec,
        *arg = NULL;
 
        memset(&child, 0, sizeof(child));
+       child.use_shell = 1;
        child.argv = argv;
        child.out = -1;
        if (start_command(&child) != 0 ||