CMakePushCheckState: Fix cmake_push_check_state RESET argument

This option was added by commit v2.8.12~138^2 (Add
cmake_reset_check_state() macro, 2013-07-28) but has never worked.
Fix the implementation to refer to macro arguments properly (not as
normal variables).

Fixes: #17048

Modules/CMakePushCheckState.cmake

@@ -62,7 +62,7 @@ macro(CMAKE_PUSH_CHECK_STATE)
    set(_CMAKE_REQUIRED_FLAGS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}       ${CMAKE_REQUIRED_FLAGS})
    set(_CMAKE_REQUIRED_QUIET_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}       ${CMAKE_REQUIRED_QUIET})
 
-   if (ARGC GREATER 0 AND ARGV0 STREQUAL "RESET")
+   if (${ARGC} GREATER 0 AND "${ARGV0}" STREQUAL "RESET")
       cmake_reset_check_state()
    endif()
 

Tests/CMakeTests/PushCheckStateTest.cmake.in

@@ -1,3 +1,4 @@
+cmake_minimum_required(VERSION 3.8)
 include(CMakePushCheckState)
 
 set(CMAKE_EXTRA_INCLUDE_FILES file1)
@@ -26,6 +27,27 @@ set(CMAKE_REQUIRED_LIBRARIES lib3)
 set(CMAKE_REQUIRED_FLAGS flag3)
 set(CMAKE_REQUIRED_QUIET 3)
 
+cmake_push_check_state(RESET)
+
+foreach(pair IN ITEMS
+  EXTRA_INCLUDE_FILES|
+  REQUIRED_INCLUDES|
+  REQUIRED_DEFINITIONS|
+  REQUIRED_LIBRARIES|
+  REQUIRED_FLAGS|
+  REQUIRED_QUIET|
+  )
+  string(REPLACE "|" ";" pair "${pair}")
+  list(GET pair 0 var)
+  list(GET pair 1 expected)
+  if (NOT "${CMAKE_${var}}" STREQUAL "${expected}")
+    set(fatal TRUE)
+    message("ERROR: CMAKE_${var} is \"${CMAKE_${var}}\" (expected \"${expected}\")" )
+  endif()
+endforeach()
+
+cmake_pop_check_state()
+
 cmake_pop_check_state()
 
 foreach(pair IN ITEMS