Strengthen compilation flag

Enable some more compilation flags turning some warnings into errors.

src/examples/test_ROI_ORB.cpp

@@ -41,7 +41,7 @@ int main(int argc, char** argv)
cv::Feature2D* detector_descriptor_ptr_;
-    cv::DescriptorMatcher* matcher_ptr_;
+    //cv::DescriptorMatcher* matcher_ptr_;
unsigned int nfeatures = 20;
float scaleFactor = 1.2;
@@ -52,7 +52,7 @@ int main(int argc, char** argv)
unsigned int scoreType = 0;              //#enum { kBytes = 32, HARRIS_SCORE=0, FAST_SCORE=1 };
unsigned int patchSize = 31;
-    unsigned int fastThreshold = 20;
+    //unsigned int fastThreshold = 20;
unsigned int roi_width = 50;
unsigned int roi_heigth = 50;
@@ -67,16 +67,16 @@ int main(int argc, char** argv)
patchSize);//,
//                                           fastThreshold);
-    unsigned int nominal_pattern_radius = 0;
-    unsigned int pattern_radius = (unsigned int)( (nominal_pattern_radius) * pow(scaleFactor, nlevels-1));
+    //unsigned int nominal_pattern_radius = 0;
+    //unsigned int pattern_radius = (unsigned int)( (nominal_pattern_radius) * pow(scaleFactor, nlevels-1));
//    std::cout << "nominal pattern radius: " << _dd_params->nominal_pattern_radius << std::endl;
//    std::cout << "scale factor: " << params_orb->scaleFactor << std::endl;
//    std::cout << "nlevels: " << params_orb->nlevels << std::endl;
-    unsigned int size_bits = detector_descriptor_ptr_->descriptorSize() * 8;
-    matcher_ptr_ = new cv::BFMatcher(6);
+    //unsigned int size_bits = detector_descriptor_ptr_->descriptorSize() * 8;
+    //matcher_ptr_ = new cv::BFMatcher(6);