After-merge fixes

Fix type mismatches in the unit test mdev10259().

btr_search_info_get_ref_count(): Do not return early if !table->space.
We can simply access table->space_id even after the tablespace has
been discarded.

btr_get_search_latch(): Relax a debug assertion to allow
!index->table->space.

storage/innobase/btr/btr0sea.cc

@@ -431,7 +431,7 @@ btr_search_info_get_ref_count(
 {
 	ulint ret = 0;
 
-	if (!btr_search_enabled || !index->table->space) {
+	if (!btr_search_enabled) {
 		return(ret);
 	}
 

storage/innobase/include/btr0sea.ic

@@ -152,7 +152,8 @@ static inline bool btr_search_own_any(ulint mode)
 static inline rw_lock_t* btr_get_search_latch(const dict_index_t* index)
 {
 	ut_ad(index != NULL);
-	ut_ad(index->table->space->id == index->table->space_id);
+	ut_ad(!index->table->space
+	      || index->table->space->id == index->table->space_id);
 
 	ulint	ifold = ut_fold_ulint_pair(ulint(index->id),
 					   index->table->space_id);

unittest/sql/mf_iocache-t.cc

@@ -213,14 +213,14 @@ void mdev10259()
   res= reinit_io_cache(&info, READ_CACHE, 0, 0, 0);
   ok(res == 0, "reinit READ_CACHE" INFO_TAIL);
 
-  res= my_b_fill(&info);
-  ok(res == 200, "fill" INFO_TAIL);
+  size_t s= my_b_fill(&info);
+  ok(s == 200, "fill" INFO_TAIL);
 
-  res= my_b_fill(&info);
-  ok(res == 0, "fill" INFO_TAIL);
+  s= my_b_fill(&info);
+  ok(s == 0, "fill" INFO_TAIL);
 
-  res= my_b_fill(&info);
-  ok(res == 0, "fill" INFO_TAIL);
+  s= my_b_fill(&info);
+  ok(s == 0, "fill" INFO_TAIL);
 
   res= reinit_io_cache(&info, WRITE_CACHE, saved_pos, 0, 0);
   ok(res == 0, "reinit WRITE_CACHE" INFO_TAIL);
@@ -230,14 +230,14 @@ void mdev10259()
 
   ok(200 == my_b_bytes_in_cache(&info),"my_b_bytes_in_cache == 200");
 
-  res= my_b_fill(&info);
-  ok(res == 0, "fill" INFO_TAIL);
+  s= my_b_fill(&info);
+  ok(s == 0, "fill" INFO_TAIL);
 
-  res= my_b_fill(&info);
-  ok(res == 0, "fill" INFO_TAIL);
+  s= my_b_fill(&info);
+  ok(s == 0, "fill" INFO_TAIL);
 
-  res= my_b_fill(&info);
-  ok(res == 0, "fill" INFO_TAIL);
+  s= my_b_fill(&info);
+  ok(s == 0, "fill" INFO_TAIL);
 
   res= reinit_io_cache(&info, WRITE_CACHE, saved_pos, 0, 0);
   ok(res == 0, "reinit WRITE_CACHE" INFO_TAIL);