Add "classify" keyvalue to override monster classification.

src/dlls/squeakgrenade.cpp

@@ -47,6 +47,12 @@ float CMSqueakGrenade::m_flNextBounceSoundTime = 0;
 
 int CMSqueakGrenade :: Classify ( void )
 {
+	// E
+	if ( m_iClassifyOverride == -1 ) // helper
+		return CLASS_NONE;
+	else if ( m_iClassifyOverride > 0 )
+		return m_iClassifyOverride; // override
+	
 	return CLASS_ALIEN_MONSTER;
 }