wxNviz: set minimum line width to 1 (merge from release branch, https://trac.osgeo.org/grass/changeset/54853)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@54855 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/nviz/tools.py

@@ -1223,7 +1223,7 @@ class NvizToolWindow(FN.FlatNotebook):
         
         width = wx.SpinCtrl(parent = panel, id = wx.ID_ANY, size = (65, -1),
                             initial = 1,
-                            min = 0,
+                            min = 1,
                             max = 100)
         width.SetValue(1)
         self.win['vector']['lines']['width'] = width.GetId()