fix: 编码规范问题修复

1.拼写错误
2.指针判空
3.函数返回值处理

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: I8fad28051cab6d99357ffbb29aa0720235ecf502

apps/trace/src/trace.c

@@ -70,6 +70,10 @@ static void TraceRead(int fd, size_t size)
 {
     ssize_t i;
     ssize_t len;
+    if (size <= 0) {
+        return;
+    }
+
     char *buffer = (char *)malloc(size);
     if (buffer == NULL) {
         printf("Read buffer malloc failed.\n");