vbscript: Short if statement may have optional 'end if'.

dlls/vbscript/parser.y

@@ -221,9 +221,13 @@ IfStatement
     : tIF Expression tTHEN tNL StatementsNl ElseIfs_opt Else_opt tEND tIF
                                             { $$ = new_if_statement(ctx, $2, $5, $6, $7); CHECK_ERROR; }
     | tIF Expression tTHEN Statement        { $$ = new_if_statement(ctx, $2, $4, NULL, NULL); CHECK_ERROR; }
-    | tIF Expression tTHEN Statement tELSE Statement
+    | tIF Expression tTHEN Statement tELSE Statement EndIf_opt
                                             { $$ = new_if_statement(ctx, $2, $4, NULL, $6); CHECK_ERROR; }
 
+EndIf_opt
+    : /* empty */
+    | tEND tIF
+
 ElseIfs_opt
     : /* empty */                           { $$ = NULL; }
     | ElseIfs                               { $$ = $1; }

dlls/vbscript/tests/lang.vbs

@@ -209,6 +209,8 @@ if false then :
 
 if false then x = y : if true then call ok(false, "embedded if called")
 
+if false then x=1 else x=2 end if
+
 if false then
     ok false, "if false called"
 end if