Time::HiRes.xs: hrstatns() change dTHX -> pTHX inside static func

More efficient. This is a static, there are no binary compat concerns.
The dTHX is from initial commit of hrstatns() in commit:

75d5269 - Steve Peters - 10/13/2006 10:11:04 AM
Upgrade to Time-HiRes-1.92.

Author: bulk88

dist/Time-HiRes/HiRes.pm

@@ -50,7 +50,7 @@ our @EXPORT_OK = qw (usleep sleep ualarm alarm gettimeofday time tv_interval
                  stat lstat utime
                 );
 
-our $VERSION = '1.9778';
+our $VERSION = '1.9779';
 our $XS_VERSION = $VERSION;
 $VERSION = eval $VERSION;
 

dist/Time-HiRes/HiRes.xs

@@ -630,10 +630,13 @@ myNVtime()
 
 #endif /* #ifdef HAS_GETTIMEOFDAY */
 
-static void
-hrstatns(UV *atime_nsec, UV *mtime_nsec, UV *ctime_nsec)
+/*  Force inline this because it has only 1 caller:
+        XSUB void stat(...) PROTOTYPE: ;$
+    Change back to plain "static", if in the future a 2nd call site is added */
+
+PERL_STATIC_FORCE_INLINE void
+S_hrstatns(pTHX_ UV *atime_nsec, UV *mtime_nsec, UV *ctime_nsec)
 {
-    dTHX;
 #if TIME_HIRES_STAT == 1
     *atime_nsec = PL_statcache.st_atimespec.tv_nsec;
     *mtime_nsec = PL_statcache.st_mtimespec.tv_nsec;
@@ -661,6 +664,8 @@ hrstatns(UV *atime_nsec, UV *mtime_nsec, UV *ctime_nsec)
 #endif /* !TIME_HIRES_STAT */
 }
 
+#define hrstatns(_at,_mt,_ct) S_hrstatns(aTHX_ (_at),(_mt),(_ct))
+
 /* Until Apple implements clock_gettime()
  * (ditto clock_getres() and clock_nanosleep())
  * we will emulate them using the Mach kernel interfaces. */