fbc: internal: add error/warning message sentinel

Try and make easier to resolve conflicts when
error messages and warning messages are added on
two different development branches.  The conflicts
should be easy to resolve using both commits but are
typically complicated by the position of the comma
in the array initializer list.

- add end of list marker to error.bas:warningMsgs()
- add end of list marker to error.bas:errorMsgs()

src/compiler/error.bas

@@ -41,7 +41,7 @@ declare function hMakeParamDesc _
 ''globals
 	dim shared errctx as FB_ERRCTX
 
-	dim shared warningMsgs( 1 to FB_WARNINGMSGS-1 ) as FBWARNING = _
+	dim shared warningMsgs( 1 to FB_WARNINGMSGS ) as FBWARNING = _
 	{ _
 		( /'FB_WARNINGMSG_PASSINGSCALARASPTR        '/ 2, @"Passing scalar as pointer" ), _
 		( /'FB_WARNINGMSG_PASSINGPTRTOSCALAR        '/ 2, @"Passing pointer to scalar" ), _
@@ -92,10 +92,11 @@ declare function hMakeParamDesc _
 		( /'FB_WARNINGMSG_RESERVEDGLOBALSYMBOL      '/ 1, @"Use of reserved global or backend symbol" ), _
 		( /'FB_WARNINGMSG_EXPECTEDDIGIT             '/ 1, @"Expected digit" ), _
 		( /'FB_WARNINGMSG_UPCASTDISCARDSINITIALIZER '/ 1, @"Up-casting discards initializer(s)" ), _
-		( /'FB_WARNINGMSG_BYREFTEMPVAR              '/ 2, @"Suspicious address expression passed to BYREF parameter" ) _
+		( /'FB_WARNINGMSG_BYREFTEMPVAR              '/ 2, @"Suspicious address expression passed to BYREF parameter" ), _
+		( /'FB_WARNINGMSGS                          '/ 0, @"FB_WARNINGMSGS" ) _
 	}
 
-	dim shared errorMsgs( 1 to FB_ERRMSGS-1 ) as const zstring ptr => _
+	dim shared errorMsgs( 1 to FB_ERRMSGS ) as const zstring ptr => _
 	{ _
 		/'FB_ERRMSG_ARGCNTMISMATCH                     '/ @"Argument count mismatch", _
 		/'FB_ERRMSG_EXPECTEDEOF                        '/ @"Expected End-of-File", _
@@ -424,7 +425,8 @@ declare function hMakeParamDesc _
 		/'FB_ERRMSG_ILLEGALUSEOFRESERVEDSYMBOL         '/ @"Illegal use of reserved symbol", _
 		/'FB_ERRMSG_EXPECTEDCOMMAORSEMICOLON           '/ @"Expected ',' or ';'", _
 		/'FB_ERRMSG_EXPECTEDFILENUMBEREXPRESSION       '/ @"Expected file number expression", _
-		/'FB_ERRMSG_MALFORMEDSOURCEDATEEPOCH           '/ @"Malformed SOURCE_DATE_EPOCH environment variable" _
+		/'FB_ERRMSG_MALFORMEDSOURCEDATEEPOCH           '/ @"Malformed SOURCE_DATE_EPOCH environment variable", _
+		/'FB_ERRMSGS                                   '/ @"FB_ERRMSGS"  _
 	}
 
 
@@ -445,6 +447,12 @@ sub errInit( )
 	hashInit( @errctx.undefhash, 64, TRUE )
 
 	listInit( @errctx.paramlocations, 4, sizeof( ERRPARAMLOCATION ) )
+
+	'' sanity check that warningMsgs() and errorMsgs() are the correct length
+	assert( ubound(warningMsgs) = FB_WARNINGMSGS )
+	assert( *warningMsgs(FB_WARNINGMSGS).text = "FB_WARNINGMSGS" )  
+	assert( ubound(errorMsgs) = FB_ERRMSGS )
+	assert( *errorMsgs(FB_ERRMSGS) = "FB_ERRMSGS" )
 end sub
 
 sub errEnd( )