fix abs(x) error

Signed-off-by: huhui <huhui@sharkgulf.com>

Application/libs/shark_types.h

@@ -29,4 +29,4 @@ typedef int64_t s64;
 
 typedef enum { shark_false, shark_true } shark_bool;
 
-#define abs(x) ((x>0)?x:-x)
+#define abs(x) (((x)>0)?(x):-(x))