fix typo in m4 test

b4377269 · Philip Carns · 930ae155 · b4377269
Commit b4377269 authored Oct 02, 2018 by Philip Carns
--- a/maint/config/check_zlib.m4
+++ b/maint/config/check_zlib.m4
@@ -20,7 +20,7 @@ else
  AC_MSG_ERROR(zlib is required)
 fi])

-AC_CHECK_HEADER(zlib.h, [],[AC_MSG_ERROR(z.h not found)])
+AC_CHECK_HEADER(zlib.h, [],[AC_MSG_ERROR(zlib.h not found)])
 AC_CHECK_LIB(z, inflateEnd, [],[AC_MSG_ERROR(libz not found)])

 ])