Add memleak.patch to fix https://sourceforge.net/p/mingw-w64/bugs/571/

OBS-URL: https://build.opensuse.org/package/show/windows:mingw:win64/mingw64-winpthreads?expand=0&rev=18

memleak.patch

@@ -0,0 +1,16 @@
+Index: winpthreads/src/thread.c
+===================================================================
+--- winpthreads.orig/src/thread.c
++++ winpthreads/src/thread.c
+@@ -295,8 +295,10 @@ push_pthread_mem (_pthread_v *sv)
+   memset (sv, 0, sizeof(struct _pthread_v));
+   if (pthr_last == NULL)
+     pthr_root = pthr_last = sv;
+-  else
++  else {
+     pthr_last->next = sv;
++    pthr_last = sv;
++  }
+   pthread_mutex_unlock (&mtx_pthr_locked);
+ }
+ 

mingw64-winpthreads.spec

@@ -27,6 +27,7 @@ Url:            http://mingw-w64.sf.net/
 #DL-URL:	http://downloads.sf.net/mingw-w64/mingw-w64-v5.0-rc1.tar.bz2
 Source:         mingw-w64-winpthreads-%version.tar.xz
 Source9:        %name-rpmlintrc
+Patch1:         memleak.patch
 BuildRequires:  mingw64-cross-gcc-bootstrap
 BuildRequires:  mingw64-cross-pkg-config
 BuildRequires:  mingw64-filesystem
@@ -63,6 +64,7 @@ mingw-w64's implementation of POSIX threads for Windows.
 
 %prep
 %setup -q -n winpthreads
+%patch1 -p1
 
 %build
 # The build is trying to link with libpthread.a but it has no need