fix prtypes.h

nsprpub/pr/include/prtypes.h

@@ -30,6 +30,13 @@
 ** for all C files.
 **/
 
+/* the following update, a big '#if 0' for most of this file
+** intentionally breaks the build of NSPR on the tip of the source tree
+** nobody but NSPR should be interested in the tip right now
+** anyway.
+*/
+#if 0
+
 #ifndef prtypes_h___
 #define prtypes_h___
 
@@ -477,3 +484,4 @@ PR_END_EXTERN_C
 
 #endif /* prtypes_h___ */
 
+#endif /* the #if 0 that intentionally breaks the tree */