Update blocks.def.h

blocks.def.h

@@ -10,6 +10,12 @@ static const Block blocks[] = {
     {"", "dwmblocks-network", SECONDS(5), 0},
 };
 
+#include "pulse-listener.h"
+
+static const ThreadCallback thread_callbacks[] = {
+    pulse_listener_main
+};
+
 // sets delimeter between status commands. NULL character ('\0') means no delimeter.
 static char delim[] = "  ";
 static unsigned int delimLen = 5;