lock_has_to_wait() is needed in the INFORMATION_SCHEMA implementation

in order to determine which lock is blocking which. Make it non-static
and put its definition in include/lock0lock.h.

Approved by:	Heikki (via IM)

include/lock0lock.h

@@ -519,6 +519,18 @@ lock_is_table_exclusive(
 	dict_table_t*	table,	/* in: table */
 	trx_t*		trx);	/* in: transaction */
 /*************************************************************************
+Checks if a lock request lock1 has to wait for request lock2. */
+
+ibool
+lock_has_to_wait(
+/*=============*/
+			/* out: TRUE if lock1 has to wait for lock2 to be
+			removed */
+	lock_t*	lock1,	/* in: waiting lock */
+	lock_t*	lock2);	/* in: another lock; NOTE that it is assumed that this
+			has a lock bit set on the same record as in lock1 if
+			the locks are record locks */
+/*************************************************************************
 Checks that a transaction id is sensible, i.e., not in the future. */
 
 ibool

lock/lock0lock.c

@@ -984,7 +984,7 @@ lock_rec_has_to_wait(
 
 /*************************************************************************
 Checks if a lock request lock1 has to wait for request lock2. */
-static
+
 ibool
 lock_has_to_wait(
 /*=============*/