Introduce CancelCurrentDiabloMsg and hide msgdelay

Source/diablo.cpp

@@ -533,7 +533,7 @@ void PressKey(int vkey)
 			stream_stop();
 		}
 		AutomapActive = false;
-		msgdelay = 0;
+		CancelCurrentDiabloMsg();
 		gamemenu_off();
 		doom_close();
 	}
@@ -1228,7 +1228,7 @@ void HelpKeyPressed()
 		}
 		QuestLogIsOpen = false;
 		AutomapActive = false;
-		msgdelay = 0;
+		CancelCurrentDiabloMsg();
 		gamemenu_off();
 		DisplayHelp();
 		doom_close();
@@ -1738,7 +1738,7 @@ bool PressEscKey()
 	}
 
 	if (IsDiabloMsgAvailable()) {
-		msgdelay = 0;
+		CancelCurrentDiabloMsg();
 		rv = true;
 	}
 

Source/error.cpp

@@ -13,13 +13,12 @@
 
 namespace devilution {
 
-uint32_t msgdelay;
-
 namespace {
 
 diablo_message msgtable[MAX_SEND_STR_LEN];
 uint8_t msgcnt;
 diablo_message msgflag;
+uint32_t msgdelay;
 
 } // namespace
 
@@ -104,6 +103,11 @@ bool IsDiabloMsgAvailable()
 	return msgflag != EMSG_NONE;
 }
 
+void CancelCurrentDiabloMsg()
+{
+	msgdelay = 0;
+}
+
 void ClrDiabloMsg()
 {
 	for (auto &msg : msgtable)

Source/error.h

@@ -69,10 +69,9 @@ enum diablo_message : uint8_t {
 	EMSG_SHRINE_MURPHYS,
 };
 
-extern uint32_t msgdelay;
-
 void InitDiabloMsg(diablo_message e);
 bool IsDiabloMsgAvailable();
+void CancelCurrentDiabloMsg();
 void ClrDiabloMsg();
 void DrawDiabloMsg(const Surface &out);