r.out.tiff: does not allow selection of destination directory

[pcav]

When exporting a raster to a tiff with r.out.tiff, the user cannot select the destination directory. The tiff gets saved to the home directory, but this should be a choice of the user.

[pcav]

The code differences are:

r.out.bin:

75 	    parm.output = G_define_option();
76 	    parm.output->key = "output";
77 	    parm.output->type = TYPE_STRING;
78 	    parm.output->required = NO;
79 	    parm.output->description =
80 	        _("Name for output binary map (use output=- for stdout)");

but r.out.tiff:

106 	    outopt = G_define_option();
107 	    outopt->key = "output";
108 	    outopt->type = TYPE_STRING;
109 	    outopt->required = YES;
110 	    outopt->gisprompt = "new_file,tiff,tiff";
111 	    outopt->description = _("Name for new TIFF file");

Apparently the presence of gisprompt disactivates the directory browse button in QGIS.

[rugginoso]

The problem was in the r.out.tiff.qgm module. Fixed in r10944.