Dovecot buld patch for old Slackware (gcc-3.4/libc 2.3.1)

--- src/lib/compat.h~   2017-06-08 14:44:41.000000000 -0700
+++ src/lib/compat.h    2017-06-08 14:44:41.000000000 -0700
@@ -179,8 +179,8 @@
 #    define pread i_my_pread
 #    define pwrite i_my_pwrite
 #  endif
-ssize_t i_my_pread(int fd, void *buf, size_t count, off_t offset);
-ssize_t i_my_pwrite(int fd, const void *buf, size_t count, off_t offset);
+ssize_t i_my_pread(int fd, void *buf, size_t count, off_t offset) __THROW;
+ssize_t i_my_pwrite(int fd, const void *buf, size_t count, off_t offset) __THROW;
 #endif

 #ifndef HAVE_SETEUID