Upgrade pffft to 3f1559f08223c8dfc276170e4b43ab2d07ecd188 am: 541d3f67e0 am: 249b6659b0 am: 60a5d42dc5

Original change: https://android-review.googlesource.com/c/platform/external/pffft/+/1564440

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I1f36451539bd149fea86f1a7e635e61818be4c4a
diff --git a/METADATA b/METADATA
index f3b9f91..5103d33 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@
     type: GIT
     value: "https://github.com/marton78/pffft.git"
   }
-  version: "b9819ffacac25e62727fc854f8c78522fb4eb2b3"
+  version: "3f1559f08223c8dfc276170e4b43ab2d07ecd188"
   license_type: NOTICE
   last_upgrade_date {
-    year: 2020
-    month: 12
-    day: 29
+    year: 2021
+    month: 1
+    day: 28
   }
 }
diff --git a/simd/pf_sse2_double.h b/simd/pf_sse2_double.h
index 6c53e8f..ba01c47 100644
--- a/simd/pf_sse2_double.h
+++ b/simd/pf_sse2_double.h
@@ -33,8 +33,8 @@
    SOFTWARE.
 */
 
-#ifndef PF_NEON_DBL_H
-#define PF_NEON_DBL_H
+#ifndef PF_SSE2_DBL_H
+#define PF_SSE2_DBL_H
 
 //detect sse2 support under MSVC
 #if defined ( _M_IX86_FP )