prevent buf from escaping into global namespace

diff --git a/watch-library/hardware/watch/watch_private.c b/watch-library/hardware/watch/watch_private.c
index a0525d3c005d7340ed58c1d0b98fd31f4141ff16..e651f3ebe02d445e37241e4566dc7ece302fecce 100644 (file)
--- a/watch-library/hardware/watch/watch_private.c
+++ b/watch-library/hardware/watch/watch_private.c
@@ -255,7 +255,7 @@ int _write(int file, char *ptr, int len) {
     return 0;
 }
 
-char buf[256] = {0};
+static char buf[256] = {0};
 
 int _read(int file, char *ptr, int len) {
     (void)file;