Made Vector::ptrw explicit for writing, compiler was sometimes using the wrong function,

leading to unnecesary copy on writes and reduced performance.

editor/project_manager.cpp

@@ -383,7 +383,7 @@ private:
 
 							//read
 							unzOpenCurrentFile(pkg);
-							unzReadCurrentFile(pkg, data.ptr(), data.size());
+							unzReadCurrentFile(pkg, data.ptrw(), data.size());
 							unzCloseCurrentFile(pkg);
 
 							FileAccess *f = FileAccess::open(dir.plus_file(path), FileAccess::WRITE);