fix(ipc): eliminate some trivial warnings

Author: Prcuvu

WeaselIPC/WeaselClientImpl.cpp

@@ -198,7 +198,7 @@ LRESULT ClientImpl::_SendMessage(WEASEL_IPC_COMMAND Msg, DWORD wParam, DWORD lPa
 		PipeMessage req{ Msg, wParam, lParam };
 		return channel.Transact(req);
 	}
-	catch (DWORD ex) {
+	catch (DWORD /* ex */) {
 		return 0;
 	}
 }

include/PipeChannel.h

@@ -70,7 +70,7 @@ namespace weasel {
 		};
 
 	public:
-		PipeChannel(std::wstring &pn_cmd, SECURITY_ATTRIBUTES *s = NULL, size_t bs = 4 * 1024)
+		PipeChannel(std::wstring &&pn_cmd, SECURITY_ATTRIBUTES *s = NULL, size_t bs = 4 * 1024)
 			: PipeChannelBase(pn_cmd, bs, s)
 		{}