fix preprocessor in ZSTD_wildcopy
diff --git a/lib/common/zstd_internal.h b/lib/common/zstd_internal.h
index 3bc7e55..ee3cb51 100644
--- a/lib/common/zstd_internal.h
+++ b/lib/common/zstd_internal.h
@@ -261,7 +261,7 @@
  *         - ZSTD_overlap_src_before_dst: The src and dst may overlap, but they MUST be at least 8 bytes apart.
  *           The src buffer must be before the dst buffer.
  */
-MEM_STATIC FORCE_INLINE_ATTR 
+MEM_STATIC FORCE_INLINE_ATTR
 void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length, ZSTD_overlap_e const ovtype)
 {
     ptrdiff_t diff = (BYTE*)dst - (const BYTE*)src;
@@ -284,7 +284,7 @@
          * one COPY16() in the first call. Then, do two calls per loop since
          * at that point it is more likely to have a high trip count.
          */
-#ifndef __aarch64__
+#ifdef __aarch64__
         do {
             COPY16(op, ip);
         }