libmain: fix UB in verbosity assignment

This was generating an out-of-range verbosity value. We should just
process it as an int and then convert to verbosity with a clamping
function, which trivially avoids any domain type violations.

Change-Id: I0ed20da8e1496a1225ff3008b76827d99265d404

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libutil/error.hh b/src/libutil/error.hh
index 0884f9f32..06dfba0df 100644
--- a/src/libutil/error.hh
+++ b/src/libutil/error.hh
@@ -45,6 +45,8 @@ typedef enum {
     lvlVomit
 } Verbosity;
 
+Verbosity verbosityFromIntClamped(int val);
+
 /**
  * The lines of code surrounding an error.
  */