Merge pull request achael#191 from achael/achael-patch-1

fix bug in chisqgrad_camp in imager_utils.py

Author: achael

ehtim/imaging/imager_utils.py

@@ -944,7 +944,7 @@ def chisqgrad_camp(imvec, Amatrices, clamp, sigma):
            np.dot(pt2, Amatrices[1]) +
            np.dot(pt3, Amatrices[2]) +
            np.dot(pt4, Amatrices[3]))
-    out *= (-2.0/len(clamp)) * np.real(out)
+    out = (-2.0/len(clamp)) * np.real(out)
     return out