all: Fix some compiler warnings

Author: dimhotepus

CMakeLists.txt

@@ -2,7 +2,7 @@
 #
 # See https://www.wischik.com/lu/programmer/zip_utils.html
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 project(zip-utils LANGUAGES CXX)
 
 # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
@@ -379,10 +379,10 @@ add_subdirectory(examples/modify)
 if (ZIP_UTILS_OS_WIN)
   add_subdirectory(examples/progress)
     add_test(NAME zip-utils-progress COMMAND zip-utils-progress)
-endif (ZIP_UTILS_OS_WIN)
 
 add_subdirectory(examples/simple)
   add_test(NAME zip-utils-simple COMMAND zip-utils-simple)
+  endif (ZIP_UTILS_OS_WIN)
 
 add_subdirectory(examples/std)
   add_test(NAME zip-utils-std COMMAND zip-utils-std)