change input vector key to vector, as in 6.x

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@44443 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.rast.stats/v.rast.stats.py

@@ -29,7 +29,7 @@
 #%  description: Calculate extended statistics
 #%END
 #%option
-#% key: input
+#% key: vector
 #% type: string
 #% key_desc: name
 #% gisprompt: old,vector,vector
@@ -99,7 +99,7 @@ def main():
 
     raster = options['raster']
     colprefix = options['colprefix']
-    vector = options['input']
+    vector = options['vector']
     layer = options['layer']
     percentile = options['percentile']