"read of non-const variable 'filesize' is not allowed in a constant expression"

[ccomparini]

When using fpl2cc outside its own source tree, I seem to get:

src/util/utf8_buffer.h:59:19: note: read of non-const variable 'filesize' is not allowed in a constant expression
src/util/utf8_buffer.h:56:12: note: declared here
56 | size_t filesize = in.tellg();

[ccomparini]

e8903b9 I believe fixes this