Move DiabloHotkeyMsg to control.cpp and use IsChatAvailable

Source/control.cpp

@@ -2065,4 +2065,15 @@ bool control_presskeys(int vkey)
 	return true;
 }
 
+void DiabloHotkeyMsg(uint32_t dwMsg)
+{
+	if (!IsChatAvailable()) {
+		return;
+	}
+
+	assert(dwMsg < QUICK_MESSAGE_OPTIONS);
+
+	NetSendCmdString(0xFFFFFF, sgOptions.Chat.szHotKeyMsgs[dwMsg]);
+}
+
 } // namespace devilution

Source/control.h

@@ -152,6 +152,7 @@ void control_type_message();
 void control_reset_talk();
 bool control_talk_last_key(char vkey);
 bool control_presskeys(int vkey);
+void DiabloHotkeyMsg(uint32_t dwMsg);
 
 extern Rectangle ChrBtnsRect[4];
 

Source/diablo.cpp

@@ -405,17 +405,6 @@ void RightMouseDown()
 	}
 }
 
-void DiabloHotkeyMsg(uint32_t dwMsg)
-{
-	if (!gbIsMultiplayer) {
-		return;
-	}
-
-	assert(dwMsg < QUICK_MESSAGE_OPTIONS);
-
-	NetSendCmdString(0xFFFFFF, sgOptions.Chat.szHotKeyMsgs[dwMsg]);
-}
-
 bool PressSysKey(int wParam)
 {
 	if (gmenu_is_active() || wParam != DVL_VK_F10)