Remove (probably useless) typecast to avoid error message from GCC

src/queue.h

@@ -69,7 +69,7 @@ typedef struct { \
 } N
 
 #define NEW_QUEUE(T, N) \
-    T N = (T) { .length = 0, .head = NULL, .tail = NULL }
+    T N = { .length = 0, .head = NULL, .tail = NULL }
 
 /* WARNING: this is probably not what you want -- see DESTROY_QUEUE below */
 #define REINIT_QUEUE(N) { \