gh-132983: Fix compiler warning about unused function ``mt_continue_should_break...

diff --git a/Modules/_zstd/compressor.c b/Modules/_zstd/compressor.c
index f794acbc19cfc70a68195583664f95be11680b81..97693fd043efb20532a0bea77eeac31b77acbd17 100644 (file)
--- a/Modules/_zstd/compressor.c
+++ b/Modules/_zstd/compressor.c
@@ -486,11 +486,13 @@ error:
     return NULL;
 }
 
+#ifdef Py_DEBUG
 static inline int
 mt_continue_should_break(ZSTD_inBuffer *in, ZSTD_outBuffer *out)
 {
     return in->size == in->pos && out->size != out->pos;
 }
+#endif
 
 static PyObject *
 compress_mt_continue_impl(ZstdCompressor *self, Py_buffer *data)