Fix BUDDY_REQS member name

src/buddy.h

@@ -548,19 +548,19 @@ BUDDYF(take_ptr_extent)(buddy_t *buddy, const struct buddy_ptr_extent *rs,
 
 #define BUDDY_REQS(name, size)			\
 	struct {				\
-		struct i_reqalloc name_ ## i[size];	\
+		struct i_reqalloc name ## _i[size];	\
 		struct buddy_reqs name;		\
 	}
 
 #define BUDDY_REQS_INIT(parent, name, b)				\
 	do {								\
 		INIT_OBJ(&(parent)->name, BUDDY_REQS_MAGIC);		\
-		(parent)->name.space = sizeof (parent)->name_ ## i /	\
-		    sizeof *(parent)->name_ ## i;			\
+		(parent)->name.space = sizeof (parent)->name ## _i /	\
+		    sizeof *(parent)->name ## _i;			\
 		(parent)->name.buddy = b;				\
 		(parent)->name.map = (b)->map;				\
 		(parent)->name.i_wait = BUDDY_REQS_I_WAIT_INITIALIZER;	\
-		(parent)->name.i_reqalloc = (parent)->name_ ## i;	\
+		(parent)->name.i_reqalloc = (parent)->name ## _i;	\
 		BUDDY_REQS_AUDIT_INIT((parent)->name,;)		\
 	} while (0)