Fix statement-before-declaration warnings for the core code.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4906 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_libcfile.c b/coregrind/m_libcfile.c
index 2da5753..f86f2e2 100644
--- a/coregrind/m_libcfile.c
+++ b/coregrind/m_libcfile.c
@@ -212,8 +212,7 @@
    OffT off = VG_(lseek)( fd, (OffT)offset, VKI_SEEK_SET);
    if (off != 0)
       return VG_(mk_SysRes_Error)( VKI_EINVAL );
-   SysRes res = VG_(do_syscall3)(__NR_read, fd, (UWord)buf, count );
-   return res;
+   return VG_(do_syscall3)(__NR_read, fd, (UWord)buf, count );
 }
 
 /* Create and open (-rw------) a tmp file name incorporating said arg.