Fix number of members in array

This was forgotten when the contents of the array changed in
b699cde.

Author: joto

src/flex-table-column.cpp

@@ -27,7 +27,7 @@ struct column_type_lookup
     char const *name() const noexcept { return m_name; }
 };
 
-static std::array<column_type_lookup, 26> const column_types = {
+static std::array<column_type_lookup, 25> const column_types = {
     {{"text", table_column_type::text},
      {"boolean", table_column_type::boolean},
      {"bool", table_column_type::boolean},