fix the compilation when the byte order cannot be detected statically

src/runtime/c/sg/sqlite3Btree.c

@@ -4918,6 +4918,7 @@ SQLITE_PRIVATE int sqlite3PendingByte;
 # define SQLITE_UTF16NATIVE  SQLITE_UTF16BE
 #endif
 #if !defined(SQLITE_BYTEORDER)
+const int sqlite3one = 1;
 # define SQLITE_BYTEORDER    0     /* 0 means "unknown at compile-time" */
 # define SQLITE_BIGENDIAN    (*(char *)(&sqlite3one)==0)
 # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)