master now only compiles with 3.53

Author: rogerbinns

src/apsw.c

@@ -106,12 +106,8 @@ API Reference
 #include "sqlite3.h"
 #endif
 
-#if SQLITE_VERSION_NUMBER < 3051000
-#error Your SQLite version is too old.  It must be at least 3.51
-#endif
-
-#ifndef SQLITE_UTF8_ZT
-#define SQLITE_UTF8_ZT SQLITE_UTF8
+#if SQLITE_VERSION_NUMBER < 3053000
+#error Your SQLite version is too old.  It must be at least 3.53
 #endif
 
 #include "sqlite_debug.h"