Bug 451187 JS causes a crash in nspr [@ Bfree ]

freedtoa should be marked as static as the data type returned by these implementations does not need to be freed with it
r=wtc

nsprpub/pr/src/misc/prdtoa.c

@@ -2673,7 +2673,7 @@ nrv_alloc(char *s, char **rve, int n)
  * when MULTIPLE_THREADS is not defined.
  */
 
- void
+ static void
 #ifdef KR_headers
 freedtoa(s) char *s;
 #else