main/libspf2: fix implicit decl

main/libspf2/APKBUILD

@@ -4,7 +4,7 @@
 pkgname=libspf2
 pkgver=1.2.11
 _commit=8131fe140704eaae695e76b5cd09e39bd1dd220b
-pkgrel=0
+pkgrel=1
 pkgdesc="Sender Policy Framework library, a part of the SPF/SRS protocol pair."
 url="https://www.libspf2.org/"
 arch="all"
@@ -17,6 +17,7 @@ source="$pkgname-$pkgver.tar.gz::https://github.com/shevek/libspf2/archive/$_com
 	00002.patch
 	netdb_success.patch
 	musl-res_close.patch
+	implicit.patch
 	"
 builddir="$srcdir/$pkgname-$_commit"
 
@@ -63,4 +64,5 @@ bbc8b053aa5dc960be7a31ee4d4385d9ed7f42a7c998a392626610de9a7dd9f95f16ad309990d011
 18ddfe106b652e2fb9e36a9f1743fc7cecf38530da65a06ac892b60d2c430aaad657f5653495950d4af4b9833826366b79e629937498e5ce7f6af716303221c4  00002.patch
 033dd1e959004f7a1026fb1de73813e934560101e04897297e468918ee28e4d7d0f271d6f05d984db22dd43e097f6aa133df18d11419b085d89db89b120750c9  netdb_success.patch
 4fb8a28a667d8fe54a48fa89230446b758c6d532866ee26e8b9ef3032f6e0993ec19a2cc2fb265d18d259e35de6fe66183763bbc69c424de70ad8fe0dbcf7a2f  musl-res_close.patch
+1c17b099e8a3533c45881250a62c8bc52bd46572a7a36588ea9063dca09f7d431d870289abafe15ec5285354fb14301a4b6c866dd6ccd8da4488dd73cbdd7af2  implicit.patch
 "

main/libspf2/implicit.patch

@@ -0,0 +1,13 @@
+diff --git a/src/libspf2/spf_utils.c b/src/libspf2/spf_utils.c
+index 54878fa..49188dc 100644
+--- a/src/libspf2/spf_utils.c
++++ b/src/libspf2/spf_utils.c
+@@ -25,6 +25,8 @@
+ #include <memory.h>
+ #endif
+ 
++#include <string.h>
++
+ 
+ 
+ #include "spf.h"