When building a typelib, the values of constants need to be converted
from a string format (from the GIR) to a binary format. This is
currently done, for all numeric types, using `g_ascii_strto*()`
functions, but with minimal validation. String values which are not
representable as binary numbers are either silently truncated or
clamped.
`-Wfloat-conversion` has flagged that this happens for floats – a
double-precision return from `g_ascii_strtod()` is implicitly cast down
to a float.
While we should ideally have some better error handling so that
conversion to a typelib fails if a constant is not representable in the
typelib, this is a problem for *all* numeric types and not just `float`,
so add an explicit cast to ignore the error for now.
In practice there probably isn’t a problem for any numeric types here,
as there should be validation of the string value when the GIR is
generated anyway.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3405
d0cba9e6ec