Import SQLite 3.10.2.

third_party/sqlite/src/src/mem1.c

Index: third_party/sqlite/src/src/mem1.c
diff --git a/third_party/sqlite/src/src/mem1.c b/third_party/sqlite/src/src/mem1.c
index 11fc1771ed94128f1394040ad6edc09e8439399a..b960ccfd477368a2d0e7af46f74f7eb00a075fe2 100644
--- a/third_party/sqlite/src/src/mem1.c
+++ b/third_party/sqlite/src/src/mem1.c
@@ -79,9 +79,9 @@ static malloc_zone_t* _sqliteZone_;
 ** The malloc.h header file is needed for malloc_usable_size() function
 ** on some systems (e.g. Linux).
 */
-#if defined(HAVE_MALLOC_H) && defined(HAVE_MALLOC_USABLE_SIZE)
-#  define SQLITE_USE_MALLOC_H
-#  define SQLITE_USE_MALLOC_USABLE_SIZE
+#if HAVE_MALLOC_H && HAVE_MALLOC_USABLE_SIZE
+#  define SQLITE_USE_MALLOC_H 1
+#  define SQLITE_USE_MALLOC_USABLE_SIZE 1
 /*
 ** The MSVCRT has malloc_usable_size(), but it is called _msize().  The
 ** use of _msize() is automatic, but can be disabled by compiling with
@@ -172,10 +172,11 @@ static void sqlite3MemFree(void *pPrior){
 */
 static int sqlite3MemSize(void *pPrior){
 #ifdef SQLITE_MALLOCSIZE
-  return pPrior ? (int)SQLITE_MALLOCSIZE(pPrior) : 0;
+  assert( pPrior!=0 );
+  return (int)SQLITE_MALLOCSIZE(pPrior);
 #else
   sqlite3_int64 *p;
-  if( pPrior==0 ) return 0;
+  assert( pPrior!=0 );
   p = (sqlite3_int64*)pPrior;
   p--;
   return (int)p[0];