Bug 289927 - JS console shouldn't show line number if line is 0. r=mconnor

toolkit/components/console/content/console.css

@@ -53,5 +53,10 @@
     > .console-row[type="message"]
 {
   display: none;
-}  
+}
+
+/* If line number is 0, hide the line number section */
+.lineNumberRow[line="0"] {
+  display: none;
+}
 

toolkit/components/console/content/consoleBindings.xml

@@ -299,8 +299,10 @@
             <xul:label class="label" value="&errFile.label;"/>
             <xul:box class="console-error-source" xbl:inherits="href,line"/>
             <spacer flex="1"/>
-            <xul:label class="label" value="&errLine.label;"/>
+            <xul:hbox class="lineNumberRow" xbl:inherits="line">
-            <xul:label class="label" xbl:inherits="value=line" flex="1"/>
+              <xul:label class="label" value="&errLine.label;"/>
+              <xul:label class="label" xbl:inherits="value=line"/>
+            </xul:hbox>
           </xul:box>
           <xul:vbox class="console-row-code" xbl:inherits="selected,hidden=hideCode">
             <xul:label class="monospace console-code" xbl:inherits="value=code" crop="end"/>