[css-font-loading] When check() returns no font faces, switch from returning true to returning false, so typos aren't a hazard.

Author: tabatkins

css-font-loading/Overview.bs

@@ -601,7 +601,7 @@ The <code>check()</code> method</h3>
 
 		<li>
 			If the <var>font face list</var> contains no font faces,
-			return <code class="idl-code">true</code>.
+			return <code class="idl-code">false</code>.
 
 		<li>
 			If all fonts in the <var>font face list</var> have a <a attribute for=FontFace>status</a> attribute of "loaded",

css-font-loading/Overview.html

@@ -698,7 +698,7 @@ <h3 class="heading settled heading" data-level=3.4 id=font-face-set-check><span
 
 		<li>
 			If the <var>font face list</var> contains no font faces,
-			return <code class=idl-code>true</code>.
+			return <code class=idl-code>false</code>.
 
 		<li>
 			If all fonts in the <var>font face list</var> have a <a class=idl-code data-link-for=FontFace data-link-type=attribute href=#dom-fontface-status title=status>status</a> attribute of "loaded",