Fix bug in gp::vector::reserve

The bug was causing elements to be shifted forward each time the vector
reallocates.

include/gp/vector.hpp

@@ -131,7 +131,7 @@ namespace gp{
 			if(T* new_ary = (T*)alloc.get().allocate(new_data_size); new_ary) {
 				auto new_it = new_ary;
 				for(auto& elem : *this) {
-					new(o">++new_it) T(gp::move(elem));
+					new(n">new_it++) T(gp::move(elem));
 				}
 
 				if(ary != nullptr) gp_config::assertion(alloc.get().deallocate(ary), "failed to deallocate old range");
@@ -258,4 +258,4 @@ namespace gp{
 			return gp::buffer<T>{(T*)ary, (T*)ary+sz};
 		}
 	};
-}
+}