Change variable to local to avoid clashes on threads

renderdoc/os/win32/win32_hook.cpp

@@ -153,7 +153,6 @@ struct CachedHookData
   std::map<rdcstr, DllHookset> DllHooks;
   HMODULE ownmodule = NULL;
   Threading::CriticalSection lock;
-  char lowername[512] = {};
 
   std::set<rdcstr> ignores;
 
@@ -164,6 +163,8 @@ struct CachedHookData
 
   void ApplyHooks(const char *modName, HMODULE module)
   {
+    char lowername[512] = {};
+
     {
       size_t i = 0;
       while(modName[i])