Force blacklist re-check at certain points

Wine preloader that executed a non-blacklisted app may execute a blacklisted app,
or vice versa, and previous check applies to new app too.

src/blacklist.cpp

@@ -53,7 +53,9 @@ static bool check_blacklisted() {
     return blacklisted;
 }
 
-bool is_blacklisted() {
+bool is_blacklisted(bool force_recheck) {
     static bool blacklisted = check_blacklisted();
+    if (force_recheck)
+        blacklisted = check_blacklisted();
     return blacklisted;
 }

src/blacklist.h

@@ -1,3 +1,3 @@
 #pragma once
 
-bool is_blacklisted();
+bool is_blacklisted(bool force_recheck = false);

src/gl/imgui_hud.cpp

@@ -10,6 +10,7 @@
 #include "file_utils.h"
 #include "imgui_hud.h"
 #include "notify.h"
+#include "blacklist.h"
 
 #ifdef HAVE_DBUS
 #include "dbus_info.h"
@@ -68,6 +69,7 @@ void imgui_init()
 {
     if (cfg_inited)
         return;
+    is_blacklisted(true);
     parse_overlay_config(&params, getenv("MANGOHUD_CONFIG"));
     notifier.params = &params;
     start_notifier(notifier);

src/overlay.cpp

@@ -2649,9 +2649,8 @@ static VkResult overlay_CreateInstance(
    VkLayerInstanceCreateInfo *chain_info =
       get_instance_chain_info(pCreateInfo, VK_LAYER_LINK_INFO);
 
-
    std::string engineName, engineVersion;
-   if (!is_blacklisted()) {
+   if (!is_blacklisted(true)) {
       const char* pEngineName = nullptr;
       if (pCreateInfo->pApplicationInfo)
          pEngineName = pCreateInfo->pApplicationInfo->pEngineName;