Check that all aliases of a built-in function have same leakproof property.

opr_sanity.sql has a test checking that relevant properties of built-in
functions match when the same C function is referenced by multiple pg_proc
entries.  The test neglected to check proleakproof, though, and when
I added that condition it exposed that xideqint4 hadn't been updated to
match xideq.  So fix that as well, and in consequence bump catversion.

This isn't very critical, so no need to worry about fixing back branches.

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201505231
+#define CATALOG_VERSION_NO	201505291
 
 #endif

src/include/catalog/pg_proc.h

@@ -1512,7 +1512,7 @@ DESCR("length");
 DATA(insert OID = 1318 (  length			 PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 23 "1042" _null_ _null_ _null_ _null_ _null_ bpcharlen _null_ _null_ _null_ ));
 DESCR("character length");
 
-DATA(insert OID = 1319 (  xideqint4			 PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "28 23" _null_ _null_ _null_ _null_ _null_ xideq _null_ _null_ _null_ ));
+DATA(insert OID = 1319 (  xideqint4			 PGNSP PGUID 12 1 0 0 0 f f f t t f i 2 0 16 "28 23" _null_ _null_ _null_ _null_ _null_ xideq _null_ _null_ _null_ ));
 
 DATA(insert OID = 1326 (  interval_div		 PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 1186 "1186 701" _null_ _null_ _null_ _null_ _null_	interval_div _null_ _null_ _null_ ));
 

src/test/regress/expected/opr_sanity.out

@@ -130,6 +130,7 @@ WHERE p1.oid < p2.oid AND
     (p1.prolang != p2.prolang OR
      p1.proisagg != p2.proisagg OR
      p1.prosecdef != p2.prosecdef OR
+     p1.proleakproof != p2.proleakproof OR
      p1.proisstrict != p2.proisstrict OR
      p1.proretset != p2.proretset OR
      p1.provolatile != p2.provolatile OR
@@ -572,6 +573,7 @@ interval_gt(interval,interval)
 charlt("char","char")
 tidne(tid,tid)
 tideq(tid,tid)
+xideqint4(xid,integer)
 timetz_eq(time with time zone,time with time zone)
 timetz_ne(time with time zone,time with time zone)
 timetz_lt(time with time zone,time with time zone)

src/test/regress/sql/opr_sanity.sql

@@ -118,6 +118,7 @@ WHERE p1.oid < p2.oid AND
     (p1.prolang != p2.prolang OR
      p1.proisagg != p2.proisagg OR
      p1.prosecdef != p2.prosecdef OR
+     p1.proleakproof != p2.proleakproof OR
      p1.proisstrict != p2.proisstrict OR
      p1.proretset != p2.proretset OR
      p1.provolatile != p2.provolatile OR