Fixed second batch of locale-dependent calls

src/libslic3r/LocalesUtils.hpp

@@ -40,7 +40,7 @@ bool is_decimal_separator_point();
 // (We use user C locales and "C" C++ locales in most of the code.)
 std::string float_to_string_decimal_point(double value, int precision = -1);
 std::string float_to_string_decimal_point(float value,  int precision = -1);
-
+double string_to_double_decimal_point(const std::string& str, size_t* pos = nullptr);
 
 } // namespace Slic3r