Use r2 instead of r13 for TLS, since r13 is used in the ELF32 PPC
ABI.

diff --git a/include/winnt.h b/include/winnt.h
index dd495a4..7808dbf 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -2332,7 +2332,7 @@
 extern inline struct _TEB * WINAPI NtCurrentTeb(void)
 {
     struct _TEB *teb;
-    __asm__("\tmr %0, 13" : "=r" (teb));
+    __asm__("\tmr %0, 2" : "=r" (teb));
     return teb;
 }
 #else