scanner: don't warn about unexpected characters when the char is \0

diff --git a/giscanner/scannerlexer.l b/giscanner/scannerlexer.l
index 3d9aa33..d78de90 100644 (file)
--- a/giscanner/scannerlexer.l
+++ b/giscanner/scannerlexer.l
@@ -190,7 +190,7 @@ stringtext                          ([^\\\"])|(\\.)
 "\""{stringtext}*"\""                  { return STRING; }
 "L\""{stringtext}*"\""                 { return STRING; }
 
-.                                      { fprintf(stderr, "%s:%d: unexpected character `%c'\n", scanner->current_filename, lineno, yytext[0]); }
+.                                      { if (yytext[0]) fprintf(stderr, "%s:%d: unexpected character `%c'\n", scanner->current_filename, lineno, yytext[0]); }
 
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