Bug#16414644 ASSERTION FAILED: SIZE == PFS_ALLOCATED_MEMORY

Before this fix, the command
  SHOW ENGINE PERFORMANCE_SCHEMA STATUS
could report wrong amount of memory allocated,
when the amount of memory used exceeds 4GB.

The problem is that size computations are not done using size_t,
so that overflows do occur, truncating the results.

This fix compute memory sizes properly with size_t.

Tested manually.

No test script provided, as the script would need to allocate too much 
memory for the test.

storage/perfschema/pfs_engine_table.cc

-/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -512,7 +512,7 @@ bool pfs_show_status(handlerton *hton, THD *thd,
   uint buflen;
   const char *name;
   int i;
-  uint size;
+  size_t size;
 
   DBUG_ENTER("pfs_show_status");
 
@@ -526,7 +526,7 @@ bool pfs_show_status(handlerton *hton, THD *thd,
   if (stat != HA_ENGINE_STATUS)
     DBUG_RETURN(false);
 
-  uint total_memory= 0;
+  size_t total_memory= 0;
 
   for (i=0; /* empty */; i++)
   {
@@ -763,7 +763,7 @@ bool pfs_show_status(handlerton *hton, THD *thd,
       break;
     }
 
-    buflen= int10_to_str(size, buf, 10) - buf;
+    buflen= longlong10_to_str(size, buf, 10) - buf;
     if (print(thd,
               PERFORMANCE_SCHEMA_str.str, PERFORMANCE_SCHEMA_str.length,
               name, strlen(name),

storage/perfschema/pfs_global.cc

-/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -26,7 +26,7 @@
 #include <string.h>
 
 bool pfs_initialized= false;
-ulonglong pfs_allocated_memory= 0;
+size_t pfs_allocated_memory= 0;
 
 /**
   Memory allocation for the performance schema.

storage/perfschema/pfs_global.h

-/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -22,7 +22,7 @@
 */
 
 extern bool pfs_initialized;
-extern ulonglong pfs_allocated_memory;
+extern size_t pfs_allocated_memory;
 
 void *pfs_malloc(size_t size, myf flags);
 #define PFS_MALLOC_ARRAY(n, T, f) \