biology/libgtextutils: Unbreak for FreeBSD 12
From pkg-fallout:
libtool: compile: c++ -DHAVE_CONFIG_H -I. -I../.. -O2 -pipe -fstack-protector -fno-strict-aliasing -Wall -Wextra -Wformat-nonliteral -Wformat-security -Wswitch-default -Wswitch-enum -Wunused-parameter -Wfloat-equal -Werror -DDEBUG -g -O1 -DDEBUG -g -O1 -MT text_line_reader.lo -MD -MP -MF .deps/text_line_reader.Tpo -c text_line_reader.cpp -fPIC -DPIC -o .libs/text_line_reader.o
text_line_reader.cpp:47:9: error: no viable conversion from returned value of type 'std::istream' (aka 'basic_istream<char>') to function return type 'bool'
return input_stream ;
^~~~~~~~~~~~Newer C++ compilers are stricter about implicit conversions. This is
a standard fix seen in many packages and taken from an upstream commit:
https://github.com/agordon/libgtextutils/commit/d8bb66d26288293ebde7f8d88979c13c208ffce5
Approved by: jrm or wen
Will include differential in commit