[Therion] Hardening flags cause build failure

[Wookey]

I fixed a bug that was stopping the default hardening flags in Debian
actaully being used.

It turns out that using them breaks the build, specifically setting
-Werror=format-security:

from the log:
c++ -c -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -DTHLINUX -O2 -o thpoint.o thpoint.cxx
thpoint.cxx: In member function ‘virtual bool thpoint::export_mp(thexpmapmpxs*)’:
thpoint.cxx:657:89: error: format not a string literal and no format arguments [-Werror=format-security]

The code is:

        if (!thisnan(this->xsize)) {
          //if (double(int(this->xsize)) != this->xsize)
          //  sprintf(buff,"%.1f",this->xsize);
          //else
          //  sprintf(buff,"%.0f",this->xsize);
          fprintf(out->file,utf2tex(out->layout->units.format_human_length(this->xsize)));
	}

I don't understand this beyond the issue being that a format string
really should be supplied, otherwise it's a security risk, and it's not
being. Can someone supply a fix please?


Wookey
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