It turns out that other platforms besides NTO don't have PATH_MAX, so this change should fix them all.

gfx/src/gtk/nsPrintdGTK.h

@@ -35,8 +35,7 @@ PR_BEGIN_EXTERN_C
 #define NS_A4_SIZE        3
 #endif
 
-#ifdef NTO
-// XXX Perhaps an NSPR macro would be a better solution.
+#ifndef PATH_MAX
 #define PATH_MAX	_POSIX_PATH_MAX
 #endif
 

widget/src/gtk2/nsPrintdGTK.h

@@ -35,8 +35,7 @@ PR_BEGIN_EXTERN_C
 #define NS_A4_SIZE        3
 #endif
 
-#ifdef NTO
-// XXX Perhaps an NSPR macro would be a better solution.
+#ifndef PATH_MAX
 #define PATH_MAX	_POSIX_PATH_MAX
 #endif