Added sanity check to prevent infinite loop

Added sanity check to prevent infinite looping of the while loop if the parentWidth is 0, e.g. parent is "display: none".

js/jquery.slabtext.js

@@ -78,6 +78,11 @@
                 // Cache the parent containers width       
                 var parentWidth = $this.width(),
                     fs;
+
+                //Sanity check to prevent infinite loop
+                if ( parentWidth === 0 ) {
+                    return;
+                }
 
                 // Remove the slabtextdone and slabtextinactive classnames to enable the inline-block shrink-wrap effect
                 $this.removeClass("slabtextdone slabtextinactive");
@@ -237,4 +242,4 @@
             };        
         });
     };
-})(jQuery);
+})(jQuery);