Added missing requirements check.

e44b2aa2 · Davis King · 21e3e81f · e44b2aa2
Commit e44b2aa2 authored Jan 23, 2016 by Davis King
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cudnn_dlibapi.cpp dlib/dnn/cudnn_dlibapi.cpp +3 -1

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--- a/dlib/dnn/cudnn_dlibapi.cpp
+++ b/dlib/dnn/cudnn_dlibapi.cpp
@@ -268,7 +268,9 @@ namespace dlib
                  grad.nr() == 1 &&
                  grad.nc() == 1 &&
                  gradient_input.k() == grad.k() &&
-                  gradient_input.size() > 0,"");
+                  gradient_input.size() > 0 &&
+                  is_same_object(grad,gradient_input) == false
+                  ,"");
            const float alpha = 1;
            const float beta = 0;