Fixed repeating attribute names

The attribute names here are repeated, so the chopper will lose data
after they close their sheet.

AW/apocalypse-world.html

@@ -514,11 +514,11 @@
 			<div class="sheet-box 	sheet-chopper">
  				  <h3><span>Your Bike</span></h3>
  				  <label class="sheet-custom">Strength:</label> 
-  			      <input type="text" name="attr_gangsize" />  
+  			      <input type="text" name="attr_bikestrength" />  
   			      <label class="sheet-custom">Looks:</label>  
-  			      <input type="text" name="attr_gangharm" />   
+  			      <input type="text" name="attr_bikelook" />   
   			      <label class="sheet-custom">Weaknesses:</label> 
-  			      <input type="text" name="attr_gangarmor" />   
+  			      <input type="text" name="attr_bikeweakness" />   
 			</div>
 			<div class="sheet-box sheet-driver">
  				  <h3><span>Your Car(s)</span></h3>