fix broken script

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@48093 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/i.tasscap/i.tasscap.py

@@ -105,7 +105,7 @@ def calc1(out, bands, k1, k2, k3, k4, k5, k7, k0 = 0):
     grass.run_command('r.colors', map = out, color = 'grey')
 
 def calcN(options, i, n):
-    outpre = options['outprefix']
+    outpre = options['output_prefix']
     grass.message(_("LANDSAT-%d...") % n)
     for j, p in enumerate(parms[i]):
 	out = "%s.%d" % (outpre, j + 1)