getTotalWeightVolume : add conversion Lb & oz to KG

New conversion value : Oz once
Little az a wizzard...

htdocs/core/class/commonobject.class.php

@@ -3097,9 +3097,18 @@ abstract class CommonObject
                 $trueWeightUnit=pow(10, $weightUnit);
                 $totalWeight += $weight * $qty * $trueWeightUnit;
             }
-            else
-            {
-                $totalWeight += $weight * $qty;   // This may be wrong if we mix different units
+            else {
+		if ($weight_units == 99) {
+			// conversion 1 Livre = 0.45359237 KG
+			$trueWeightUnit = 0.45359237;
+			$totalWeight += $weight * $qty * $trueWeightUnit;
+		} elseif ($weight_units == 98) {
+			// conversion 1 once = 0.0283495 KG
+			$trueWeightUnit = 0.0283495;
+			$totalWeight += $weight * $qty * $trueWeightUnit;
+		}
+		else
+                	$totalWeight += $weight * $qty;   // This may be wrong if we mix different units
             }
             if ($volume_units < 50)   // >50 means a standard unit (power of 10 of official unit), > 50 means an exotic unit (like inch)
             {