fix few ignored errors in gnsotic conversion

Author: Alexander Zielenski

pkg/validation/spec/gnostic.go

@@ -1253,7 +1253,7 @@ func (k *Schema) FromGnostic(g *openapi_v2.Schema) (ok bool, err error) {
 			for _, v := range g.Items.GetSchema() {
 				schema := Schema{}
 				if nok, err := schema.FromGnostic(v); err != nil {
-					return ok,nil
+					return false, err
 				} else {
 					ok = ok && nok
 				}
@@ -1349,7 +1349,7 @@ func (k *Schema) FromGnosticSchemaItem(g *openapi_v2.SchemaItem) (ok bool, err e
 		schema := p.Schema
 
 		if nok,err := k.FromGnostic(schema); err != nil {
-			return ok,nil
+			return false, err
 		} else {
 			ok = ok && nok
 		}
@@ -1515,7 +1515,7 @@ func (k *Tag) FromGnostic(g *openapi_v2.Tag) (ok bool, err error) {
 	ok = true
 
 	if nok,err := k.TagProps.FromGnostic(g); err != nil {
-		return ok,nil
+		return false,err
 	} else {
 		ok = ok && nok
 	}