fix INVALID_HANDLE_VALUE exception on attach

See:
* https://github.com/x64dbg/x64dbg/issues/1777
* https://github.com/x64dbg/x64dbg/issues/1759

GleeBug/Debugger.Loop.Dll.cpp

@@ -18,6 +18,7 @@ namespace GleeBug
         cbLoadDllEvent(loadDll, dll);
 
         //close the file handle
+        if(loadDll.hFile)
             CloseHandle(loadDll.hFile);
     }
 

GleeBug/Debugger.Loop.Process.cpp

@@ -39,6 +39,7 @@ namespace GleeBug
         cbCreateProcessEvent(createProcess, *mProcess);
 
         //close the file handle
+        if(createProcess.hFile)
             CloseHandle(createProcess.hFile);
     }