Make use of ends_with for KF

apps/openmw/mwrender/animation.cpp

@@ -609,7 +609,7 @@ namespace MWRender
     {
         std::string kfname = Misc::StringUtils::lowerCase(model);
 
-        if (kfname.size() > 4 && kfname.compare(kfname.size() - 4, 4, ".nif") == 0)
+        if (kfname.ends_with(".nif"))
             kfname.replace(kfname.size() - 4, 4, ".kf");
 
         addSingleAnimSource(kfname, baseModel);

components/misc/resourcehelpers.cpp

@@ -135,7 +135,7 @@ std::string Misc::ResourceHelpers::correctActorModelPath(const std::string& resP
     else
         mdlname.insert(mdlname.begin(), 'x');
     std::string kfname = mdlname;
-    if (kfname.size() > 4 && kfname.compare(kfname.size() - 4, 4, ".nif") == 0)
+    if (kfname.ends_with(".nif"))
         kfname.replace(kfname.size() - 4, 4, ".kf");
 
     if (!vfs->exists(kfname))