v2: fix if guard var type & handle blank ident in assign

vlib/v/checker/checker.v

@@ -153,6 +153,14 @@ pub fn (c mut Checker) infix_expr(infix_expr ast.InfixExpr) table.Type {
 }
 
 fn (c mut Checker) check_assign_expr(assign_expr ast.AssignExpr) {
+	match assign_expr.left {
+		ast.Ident {
+			if it.kind == .blank_ident {
+				return
+			}
+		}
+		else {}
+	}
 	left_type := c.expr(assign_expr.left)
 	c.expected_type = left_type
 	// t := c.table.get_type_symbol(left_type)

vlib/v/parser/parser.v

@@ -1161,12 +1161,11 @@ fn (p mut Parser) if_expr() ast.Expr {
 		is_or = true
 		p.open_scope()
 		var_name := p.check_name()
-		// p.table.register_var(
 		p.check(.decl_assign)
 		expr,typ := p.expr(0)
 		p.scope.register_var(ast.VarDecl{
 			name: var_name
-			typ: typ
+			expr: expr
 		})
 		cond = ast.IfGuardExpr{
 			var_name: var_name