Enable additional compiler warnings. Update code to conform to these

new standards, possible to compile with -Werror with them.

src/modules/chanmodes/floodprot.c

@@ -502,7 +502,7 @@ invalidsyntax:
 		return EX_DENY;
 	}
 
-	/* falltrough -- should not be used */
+	/* fallthrough -- should not be used */
 	return EX_DENY;
 }
 

src/modules/chanmodes/link.c

@@ -107,7 +107,7 @@ int cmodeL_is_ok(aClient *sptr, aChannel *chptr, char mode, char *para, int type
 		return EX_ALLOW;
 	}
 
-	/* falltrough -- should not be used */
+	/* fallthrough -- should not be used */
 	return EX_DENY;
 }
 

src/modules/m_chghost.c

@@ -32,6 +32,7 @@ ModuleHeader MOD_HEADER(m_chghost)
 	"4.2", /* Version */
 	"/chghost", /* Short description of module */
 	"3.2-b8-1",
+	NULL
     };
 
 MOD_INIT(m_chghost)

src/modules/m_mode.c

@@ -821,6 +821,7 @@ int  do_mode_char(aChannel *chptr, long modetype, char modechar, char *param,
 					if (!is_halfop(cptr, chptr)) /* htrig will take care of halfop override notices */
 						opermode = 1;
 			}
+			goto process_listmode;
 		case MODE_CHANPROT:
 			REQUIRE_PARAMETER()
 			/* not uline, not server, not chanowner, not an samode, not -a'ing yourself... */
@@ -835,12 +836,13 @@ int  do_mode_char(aChannel *chptr, long modetype, char modechar, char *param,
 					if (!is_halfop(cptr, chptr)) /* htrig will take care of halfop override notices */
 						opermode = 1;
 			}
-
+			goto process_listmode;
 
 		case MODE_HALFOP:
 		case MODE_CHANOP:
 		case MODE_VOICE:
 			REQUIRE_PARAMETER()
+process_listmode:
 			if (!(who = find_chasing(cptr, param, &chasing)))
 				break;
 			if (!who->user)
@@ -1656,6 +1658,7 @@ CMD_FUNC(_m_umode)
 						set_snomask(sptr, parv[3]);
 					goto def;
 				}
+				break;
 			case 'o':
 			case 'O':
 				if(sptr->from->flags & FLAGS_QUARANTINE)

src/modules/m_tkl.c

@@ -3052,7 +3052,7 @@ static int comp_with_mask(void *addr, void *dest, u_int mask)
 	if (memcmp(addr, dest, mask / 8) == 0)
 	{
 		int n = mask / 8;
-		int m = ((-1) << (8 - (mask % 8)));
+		int m = (0xffff << (8 - (mask % 8)));
 		if (mask % 8 == 0 || (((u_char *) addr)[n] & m) == (((u_char *) dest)[n] & m))
 		{
 			return (1);

src/modules/webirc.c

@@ -474,7 +474,7 @@ int webirc_local_pass(aClient *sptr, char *password)
 		
 			return dowebirc(sptr, ip, host, NULL);
 		}
-		/* falltrough if not in webirc block.. */
+		/* fallthrough if not in webirc block.. */
 	}
 
 	return 0; /* not webirc */