fix：修复函数返回错误等问题

Signed-off-by: zhangdengyu <zhangdengyu2@huawei.com>

apps/trace/src/trace.c

@@ -70,7 +70,7 @@ static void TraceRead(int fd, size_t size)
 {
     ssize_t i;
     ssize_t len;
-    if (size <= 0) {
+    if (size == 0) {
         return;
     }