fix typos

src/libslic3r/Print.cpp

@@ -2327,7 +2327,7 @@ void Print::_extrude_brim_from_tree(std::vector<std::vector<BrimLoop>>& loops, c
                     print_me_first->append(ExtrusionEntitiesPtr{ children });
                 }
             }
-            assert(print_me_first.size() > 0);
+            assert(print_me_first->entities().size() > 0);
         }
     };
     extrude_ptr = &extrude;

src/slic3r/Utils/PresetUpdater.cpp

@@ -281,7 +281,7 @@ void PresetUpdater::priv::sync_version() const
 			boost::property_tree::read_json(json_stream, root);
 			bool i_am_pre = false;
 			//at least two number, use '.' as separator. can be followed by -Az23 for prereleased and +Az42 for metadata
-			std::regex matcher("[0-9]+\.[0-9]+(\.[0-9]+)*(-[A-Za-z0-9]+)?(\\+[A-Za-z0-9]+)?");
+			std::regex matcher("[0-9]+\\.[0-9]+(\\.[0-9]+)*(-[A-Za-z0-9]+)?(\\+[A-Za-z0-9]+)?");
 
 			Semver current_version(SLIC3R_VERSION_FULL);
 			Semver best_pre(1,0,0,0);