iirfilt: defaulting to using internal dotprod object
// PRINTVAL() print macro
// use structured dot product? 0:no, 1:yes
-#define LIQUID_IIRFILT_USE_DOTPROD (0)
+#define LIQUID_IIRFILT_USE_DOTPROD (1)
struct IIRFILT(_s) {
TC * b; // numerator (feed-forward coefficients)
