33% reduction in score awarded for nanning

I was seeing scores for nan scout too high when playing real games.

src/Igc/common.cpp

@@ -2557,7 +2557,7 @@ void   PlayerScoreObject::CalculateScore(ImissionIGC*   pmission)
         float(m_cArtifacts)                  * pmission->GetFloatConstant(c_fcidPointsArtifacts) +
         float(m_cFlags)                      * pmission->GetFloatConstant(c_fcidPointsFlags) +
         float(m_cProbeSpot)                  * 10 +
-        float(m_cRepair)                     * 0.0006;
+        float(m_cRepair)                     * 0.0004;
 
     if (m_bWin)
         m_fScore *= 2.0f;