Pad out the sqlite3_value structure to be a multiple of 8 bytes.

FossilOrigin-Name: f76dc33bde4b2180b935d1261492d9535772ed37e54489c1a33e9f11c7c90433

src/vdbeInt.h

@@ -213,6 +213,7 @@ struct sqlite3_value {
 #endif
 #ifdef SQLITE_DEBUG_COLUMNCACHE
   u32 iTabColHash;    /* Hash of table.column that is origin of this value */
+  u32 iPadding;       /* sqlite3_value objects must be 8-byte aligned */
 #endif
 };