d.vect.thematic: fix interval count

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@63893 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/d.vect.thematic/d.vect.thematic.py

@@ -546,7 +546,7 @@ end
         line2 = 76
         line3 = 75
 
-        i = 1
+        i = 0
         first = True
 
         while i < numint: