swr/noise_shaping_data: pad coeffs to multiple of 4 when they are 1 below

This allows using code working with 4 at a time
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswresample/noise_shaping_data.c

@@ -190,6 +190,7 @@ static double const shl44[] = {
   -0.71733748912811279297,  1.0737057924270629883, -1.0225815773010253906,
   0.56649994850158691406, -0.20968692004680633545, -0.065378531813621520996,
   0.10322438180446624756, -0.067442022264003753662, -0.00495197344571352005,
+  0,
 };
 static double const shh44[] = {
    3.0259189605712890625, -6.0268716812133789062,   9.195003509521484375,