ape: Avoid undefined behaviour

Avoid the clang warning

"warning: shifting a negative signed value is undefined"

libavcodec/apedec.c

@@ -1305,7 +1305,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f,
             /* Update the adaption coefficients */
             absres = FFABS(res);
             if (absres)
-                *f->adaptcoeffs = ((res & (-1<<31)) ^ (-1<<30)) >>
+                *f->adaptcoeffs = ((res & ((~0UL) << 31)) ^ ((~0UL) << 30)) >>
                                   (25 + (absres <= f->avg*3) + (absres <= f->avg*4/3));
             else
                 *f->adaptcoeffs = 0;