Fix assert in DotProductImageFilter

In MR !427 (merged) was added an assert on the size of two vectors :

assert(in.Size() == m.Size());

but m does not exist ... It should be:

assert(in.Size() == m_Vector.Size());

Dashboard was green because the branch was compiled in release mode, without the assert.

Copyright

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Modules/Core/Functor/include/otbDotProductImageFilter.h

@@ -58,7 +58,7 @@ public:
 
   OutputType operator()(const InputType& in)
   {
-    assert(in.Size() == m.Size());
+    assert(in.Size() == m_Vector.Size());
     OutputType result = 0;
     for (unsigned int i = 0; i < in.Size(); ++i)
     {