Fix:

error: member access into incomplete type 'WINDOW' (aka '_win_st')
error: comparison between pointer and integer ('char *' and 'char')
warning: add explicit braces to avoid dangling else [-Wdangling-else]
--- screen.cc.orig	2004-04-26 08:22:26.000000000 -0500
+++ screen.cc	2024-10-16 16:43:45.000000000 -0500
@@ -80,12 +80,13 @@
 		/* not used screen */
 		snprintf(buffer, textsize, SCREEN_NOT_USED);
 	}
-	InfoTop->_cury = InfoTop->_curx = 0;
+	wmove(InfoTop, 0, 0);
 	whline(InfoTop, 0, 5);
-	InfoTop->_curx = 5;
+	wmove(InfoTop, 0, 5);
 	wprintw(InfoTop, "%s", buffer);
-	InfoTop->_curx = 5 + strlen(buffer);
-	whline(InfoTop, 0, COLSnow-(InfoTop->_curx));
+	int x = 5 + strlen(buffer);
+	wmove(InfoTop, 0, x);
+	whline(InfoTop, 0, COLSnow - x);
 	wrefresh(InfoTop);
 	SetCursorToInputScreen();
 	return;
@@ -96,9 +97,9 @@
 	CheckScreenForRedraw();
 	werase(InfoBottom);
 	int textsize = COLSnow - 24;
-	InfoBottom->_cury = InfoBottom->_curx = 0;
+	wmove(InfoBottom, 0, 0);
 	whline(InfoBottom, 0, 15);
-	InfoBottom->_curx = 15;
+	wmove(InfoBottom, 0, 15);
 	char * channel_str_ptr = MakeScreenString(0);
 	char * dchat_str_ptr = MakeScreenString(1);
 	int num_users = 0;
@@ -116,8 +117,9 @@
 		snprintf(help_buffer, HELP_BUF_LEN, "%s - no Screens!", nickname);
 	}
 	int num = print_format_text(InfoBottom, help_buffer, textsize);
-	InfoBottom->_curx = 15 + num;
-	whline(InfoBottom, 0, COLSnow - (InfoBottom->_curx));
+	int x = 15 + num;
+	wmove(InfoBottom, 0, x);
+	whline(InfoBottom, 0, COLSnow - x);
 	wrefresh(InfoBottom);
 	if(channel_str_ptr) delete[] channel_str_ptr;
 	if(dchat_str_ptr) delete[] dchat_str_ptr;
@@ -134,7 +136,7 @@
 	/* count how many messages we can print on the screen */
 	int messages_to_print = MessagesToPrint();
 	werase(TextScreen);
-	TextScreen->_curx = TextScreen->_cury = 0;
+	wmove(TextScreen, 0, 0);
 	for(int i = messages_to_print+first_print_msg-1; i >= first_print_msg; i--)
 	{
 		/* print 1 line */
@@ -186,7 +188,7 @@
 	buf[num_read] = '\0';
 	int ret = Test_Input_for_special_Chars(buf);
 	if(ret == 1) {
-		if(InputBuffer == '\0') return; /* return when enter is pressed but no input given */
+		if(InputBuffer[0] == '\0') return; /* return when enter is pressed but no input given */
 		/* Input Data is ready, parse it */
 		if(InputBuffer[0] == '/') {
 			ParseCommandToServer(NULL);
@@ -756,8 +758,15 @@
 			Classes.Connection->UnsetMaybeReconnect();
 		}
 	}
-	if(message == NULL) if(!command_used) Classes.Connection->WriteMessageToServer(InputBuffer+1);
-		else if(!command_used) Classes.Connection->WriteMessageToServer(message+1);
+	if(message == NULL) {
+		if(!command_used) {
+			Classes.Connection->WriteMessageToServer(InputBuffer+1);
+		}
+	} else {
+		if(!command_used) {
+			Classes.Connection->WriteMessageToServer(message+1);
+		}
+	}
 	DrawTextScreen();
 	return;
 }