Updated to latest m4.

[pazpar2-moved-to-github.git] / m4

diff --git a/m4 b/m4
index acee1cf..2ceb2c3 160000 (submodule)
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit acee1cf4678c8c0908d65fcbc19f49c7c5aa677f
+Subproject commit 2ceb2c3a4b580e09aadcbd1cbbb12e10b60f1337