logl: Work around OSF/1 5.1 bug.
* lib/math.in.h (logl): Override if REPLACE_LOGL is 1.
- * lib/logl.c (logl): If logf exists, use it and provide just the
+ * lib/logl.c (logl): If logl exists, use it and provide just the
workaround.
* m4/logl.m4 (gl_FUNC_LOGL_WORKS): New macro.
(gl_FUNC_LOGL): Invoke it. Set REPLACE_LOGL.