Adding a scope to fix mac build, even though I believe it's not needed.

Author: martun

include/nil/blueprint/components/algebra/fields/plonk/non_native/detail/bit_builder_component.hpp

@@ -266,7 +266,7 @@ namespace nil {
 
                     for (std::size_t i = 0; i < input_bits.size(); i++) {
                         auto bit_pos = component.bit_position(start_row_index, padding + i);
-                        assignment.witness(component.W(bit_pos.second), bit_pos.first) = input_bits[i];
+                        assignment.witness(component.W(bit_pos.second), bit_pos.first) = (input_bits[i]);
                     }
 
                     field_value_type sum = 0;
@@ -395,4 +395,4 @@ namespace nil {
     }           // namespace blueprint
 }    // namespace nil
 
-#endif    // CRYPTO3_BLUEPRINT_COMPONENTS_BIT_BUILDER_COMPONENT_HPP
+#endif    // CRYPTO3_BLUEPRINT_COMPONENTS_BIT_BUILDER_COMPONENT_HPP