fixed an alpha colormapping bug posted on sf 2832575

jdh2358 · jdh2358 · commit dce07397e1d5 · 2009-08-05T19:49:43.000Z
svn path=/branches/v0_99_maint/; revision=7395
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -488,7 +488,7 @@ def __call__(self, X, alpha=1.0, bytes=False):
         if not self._isinit: self._init()
         alpha = min(alpha, 1.0) # alpha must be between 0 and 1
         alpha = max(alpha, 0.0)
-        self._lut[:-3, -1] = alpha
+        self._lut[:,-1] = alpha
         mask_bad = None
         if not cbook.iterable(X):
             vtype = 'scalar'
