branches/zip: buf_LRU_free_block(), buf_page_try_get_func(): Assert that

there is nothing in the insert buffer for the page.  This is for
tracking down Issue #128.

buf/buf0buf.c

@@ -2406,6 +2406,11 @@ buf_page_try_get_func(
 
 	buf_pool->n_page_gets++;
 
+#ifdef UNIV_IBUF_COUNT_DEBUG
+	ut_a(ibuf_count_get(buf_block_get_space(block),
+			    buf_block_get_page_no(block)) == 0);
+#endif
+
 	return(block);
 }
 

buf/buf0lru.c

@@ -26,6 +26,7 @@ Created 11/5/1995 Heikki Tuuri
 #include "buf0flu.h"
 #include "buf0rea.h"
 #include "btr0sea.h"
+#include "ibuf0ibuf.h"
 #include "os0file.h"
 #include "page0zip.h"
 #include "log0recv.h"
@@ -1321,6 +1322,10 @@ buf_LRU_free_block(
 	ut_ad(!bpage->in_flush_list == !bpage->oldest_modification);
 	UNIV_MEM_ASSERT_RW(bpage, sizeof *bpage);
 
+#ifdef UNIV_IBUF_COUNT_DEBUG
+	ut_a(ibuf_count_get(bpage->space, bpage->offset) == 0);
+#endif /* UNIV_IBUF_COUNT_DEBUG */
+
 	if (!buf_page_can_relocate(bpage)) {
 
 		/* Do not free buffer-fixed or I/O-fixed blocks. */