[OS/2] Bug 351472: Fix build break in xpidl_java.c for GCC 3.2.2 builds, r=jhpedemonte

xpcom/typelib/xpidl/xpidl_java.c

@@ -48,6 +48,9 @@
 #ifdef XP_WIN
 #include <windef.h>
 #define PATH_MAX  MAX_PATH
+#elif defined(XP_OS2) && !defined(PATH_MAX)
+#include <os2.h>
+#define PATH_MAX  CCHMAXPATH
 #endif
 
 /* XXX Bug 331178 - nsIScriptSecurityManager inherits from non-scriptable