Minor changes to avoid compiler warnings.

dlib/image_processing/shape_predictor.h

@@ -711,7 +711,7 @@ namespace dlib
         {
             using namespace impl;
             std::deque<std::pair<unsigned long, unsigned long> > parts;
-            parts.push_back(std::make_pair(0, samples.size()));
+            parts.push_back(std::make_pair(0, (unsigned long)samples.size()));
 
             impl::regression_tree tree;
 

dlib/image_transforms/draw.h

@@ -215,7 +215,7 @@ namespace dlib
         unsigned int thickness
     ) 
     {
-        for (int i = 0; i < thickness; ++i)
+        for (unsigned int i = 0; i < thickness; ++i)
         {
             if ((i%2)==0)
                 draw_rectangle(c,shrink_rect(rect,(i+1)/2),val);