Fill out an initial implementation of the sqlite3ExprImpliesExpr() function.

FossilOrigin-Name: 8e07aa2ad5579aeb82174ce5bd432ddb9c058bc1
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 21e32ff..291957d 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -2834,8 +2834,8 @@
 void sqlite3Vacuum(Parse*);
 int sqlite3RunVacuum(char**, sqlite3*);
 char *sqlite3NameFromToken(sqlite3*, Token*);
-int sqlite3ExprCompare(Expr*, Expr*);
-int sqlite3ExprListCompare(ExprList*, ExprList*);
+int sqlite3ExprCompare(Expr*, Expr*, int);
+int sqlite3ExprListCompare(ExprList*, ExprList*, int);
 int sqlite3ExprImpliesExpr(Expr*, Expr*, int);
 void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
 void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);