Fix stack smashing... triggered by the stack overflow test (doh!)

Lubomir Rintel <lkundrak@v3.sk>

diff -urp jsl-0.3.0/src/jsl.c jsl-0.3.0.smash/src/jsl.c
--- jsl-0.3.0/src/jsl.c	2006-11-03 20:20:24.000000000 +0100
+++ jsl-0.3.0.smash/src/jsl.c	2009-04-14 23:03:37.528221874 +0200
@@ -91,7 +91,12 @@
 #define EXITCODE_FILE_ERROR 4
 
 /* file constants */
-#define MAXPATHLEN 1024
+#ifdef PATH_MAX
+#define MAXPATHLEN PATH_MAX
+#else
+#warning "MAXPATHLEN can overflow if PATH_MAX is too big"
+#define MAXPATHLEN 65536
+#endif
 
 #ifdef WIN32
 #define DEFAULT_DIRECTORY_SEPARATOR '\\'