Fix parsing integer 0

internal/imported_tests/unmarshal_imported_test.go

@@ -439,7 +439,7 @@ func TestEmptytomlUnmarshal(t *testing.T) {
 		String:     "",
 		StringList: []string{},
 		Ptr:        nil,
-		Map:        map[string]string{},
+		Map:        nil,
 	}
 
 	result := emptyMarshalTestStruct{}

parser.go

@@ -977,18 +977,22 @@ func (p *parser) scanIntOrFloat(node *ast.Node, b []byte) ([]byte, error) {
 		case 'b':
 			isValidRune = isValidBinaryRune
 		default:
-			return b, fmt.Errorf("unknown number base: %c. possible options are x (hex) o (octal) b (binary)", b[1])
+			i++
 		}
 
+		if isValidRune != nil {
 			i += 2
 			for ; i < len(b); i++ {
 				if !isValidRune(b[i]) {
+					break
+				}
+			}
+		}
+
 		node.Kind = ast.Integer
 		node.Data = b[:i]
 		return b[i:], nil
 	}
-		}
-	}
 
 	isFloat := false