Fixed what's-this problem with eph2tle.txt with comments

eph2tle.cpp

@@ -590,7 +590,8 @@ int main( const int argc, const char **argv)
    fprintf( ofile, "# Made by eph2tle, compiled " __DATE__ " " __TIME__ "\n");
    fprintf( ofile, "# Run at %s#\n", ctime( &t0));
    while( fgets_trimmed( buff, sizeof( buff), ifile))
-      fprintf( ofile, "%s\n", buff);
+      if( *buff != ';')
+         fprintf( ofile, "%s\n", buff);
    fclose( ifile);
    ifile = fopen( argv[1], "rb");
    if( !ifile)

eph2tle.txt

@@ -1,3 +1,9 @@
+;   Any line starting with ';' is treated as a comment.  This file
+; is read by 'eph2tle' (see 'eph2tle.cpp') as boilerplate to be put
+; at the start of all TLE files.
+;
+;
+;
 #    The following TLEs (Two-Line Elements) were generated by fitting
 # a numerically-integrated ephemeris,  based on the orbit given below,
 # to the SDP4/SGP4 models.  Each TLE is good for the interval between