util: Fixed assertion

diff --git a/pv/util.cpp b/pv/util.cpp
index 2e54adeaed3dffae88cb2b7354ce9eb57395302b..83f2ae0b343077725538dde7b59350e63ac07bf1 100644 (file)
--- a/pv/util.cpp
+++ b/pv/util.cpp
@@ -52,7 +52,7 @@ QString format_si_value(double v, QString unit, int prefix,
        }
 
        assert(prefix >= 0);
-       assert(prefix < countof(SIPrefixes));
+       assert(prefix < (int)countof(SIPrefixes));
 
        const double multiplier = pow(10.0,
                (int)- prefix * 3 - FirstSIPrefixPower);