Added tests for the MPC tool

dlib/control/mpc.h

@@ -67,7 +67,6 @@ namespace dlib
             matrix<double,S,S> temp = diagm(Q);
             for (unsigned long c = 0; c < horizon; ++c)
             {
-                long i = horizon-c-1;
                 lambda += trans(B)*temp*B;
                 temp = trans(A)*temp*A + diagm(Q);
             }

dlib/test/CMakeLists.txt

@@ -84,6 +84,7 @@ set (tests
    md5.cpp
    member_function_pointer.cpp
    metaprogramming.cpp
+   mpc.cpp
    multithreaded_object.cpp
    numerical_integration.cpp
    object_detector.cpp

dlib/test/makefile

@@ -99,6 +99,7 @@ SRC += max_sum_submatrix.cpp
 SRC += md5.cpp
 SRC += member_function_pointer.cpp
 SRC += metaprogramming.cpp
+SRC += mpc.cpp
 SRC += multithreaded_object.cpp
 SRC += numerical_integration.cpp
 SRC += object_detector.cpp