avutil/ripemd: make rol macro more robust by adding parentheses

This ensures that the macro remains correct in the sense of allowing
expressions for value and bits, by placing the value and bits expressions within
parentheses.
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

libavutil/ripemd.c

@@ -85,7 +85,7 @@ static const int WB[80] = {
     12, 15, 10,  4,  1,  5,  8,  7,  6,  2, 13, 14,  0,  3,  9, 11
 };
 
-#define rol(value, bits) ((value << bits) | (value >> (32 - bits)))
+#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
 
 #define ROUND128_0_TO_15(a,b,c,d,e,f,g,h)                               \
     a = rol(a + ((  b ^ c  ^ d)      + block[WA[n]]),         ROTA[n]); \