A lot of fixes for prepared statements (PS):

New mysqltest that can run mysqltest with PS
Added support for ZEROFILL in PS
Fixed crash when one called mysql_stmt_store_result() without a preceding mysql_stmt_bind_result()
Updated test cases to support --ps-protocol
(Some tests are still run using old protocol)
Fixed crash in PS when using SELECT * FROM t1 NATURAL JOIN t2...
Fixed crash in PS when using sub queries
Create table didn't signal when table was created. This could cause a "DROP TABLE created_table" in another thread to wait "forever"
Fixed wrong permissions check in PS and multi-table updates (one could get permission denied for legal quries)
Fix for PS and SELECT ... PROCEDURE
Reset all warnings when executing a new PS query
group_concat(...ORDER BY) didn't work with PS
Fixed problem with test suite when not using innodb

mysys/my_alloc.c

@@ -158,6 +158,8 @@ gptr alloc_root(MEM_ROOT *mem_root,unsigned int Size)
   next->next= mem_root->used;
   next->size= Size;
   mem_root->used= next;
+  DBUG_PRINT("exit",("ptr: 0x%lx", (((char*) next)+
+                                    ALIGN_SIZE(sizeof(USED_MEM)))));
   DBUG_RETURN((gptr) (((char*) next)+ALIGN_SIZE(sizeof(USED_MEM))));
 #else
   uint get_size, block_size;