Fix potentially buffer overrun related to readlink(2)

Signed-off-by: OBATA Akio <obache@wizdas.com>

qmake/project.cpp

@@ -724,7 +724,7 @@ TQMakeProject::isActiveConfig(const TQString &x, bool regex, TQMap<TQString, TQS
 	static char *buffer = NULL;
 	if(!buffer)
 	    buffer = (char *)malloc(1024);
-	int l = readlink(Option::mkfile::qmakespec, buffer, 1024);
+	int l = readlink(Option::mkfile::qmakespec, buffer, 1023);
 	if(l != -1) {
 	    buffer[l] = '\0';
 	    TQString r = buffer;