strtoull depends on stdlib

[Ralf Wildenhues]

Hello gnulib maintainers,

  gnulib-tool --with-tests --test strtoull

gives me

configure.ac:112: warning: gl_STDLIB_H_DEFAULTS is m4_require'd but not 
m4_defun'd
glm4/strtoull.m4:7: gl_FUNC_STRTOULL is expanded from...
configure.ac:27: gl_INIT is expanded from...
configure.ac:112: the top level
executing autoconf
configure.ac:112: warning: gl_STDLIB_H_DEFAULTS is m4_require'd but not 
m4_defun'd
glm4/strtoull.m4:7: gl_FUNC_STRTOULL is expanded from...
configure.ac:27: gl_INIT is expanded from...
configure.ac:112: the top level
configure.ac:42: error: possibly undefined macro: gl_STDLIB_MODULE_INDICATOR
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure:3934: error: possibly undefined macro: gl_STDLIB_H_DEFAULTS


OK to apply?

Thanks,
Ralf

        * modules/strtoull (Depends-on): Add stdlib.

diff --git a/modules/strtoull b/modules/strtoull
index 0347b7e..a7dea16 100644
--- a/modules/strtoull
+++ b/modules/strtoull
@@ -8,6 +8,7 @@ m4/strtoull.m4
 
 Depends-on:
 unistd
+stdlib
 strtoul
 
 configure.ac: