Remove unneeded baseToString use.

lodash.src.js

@@ -520,7 +520,7 @@
    */
   var isHostObject = (function() {
     try {
-      baseToString({ 'toString': 0 });
+      Object({ 'toString': 0 } + '');
     } catch(e) {
       return function() { return false; };
     }
@@ -3269,7 +3269,7 @@
         return '';
       }
       var padLength = length - strLength;
-      chars = chars == null ? ' ' : baseToString(chars);
+      chars = chars == null ? ' ' : (chars + '');
       return repeat(chars, ceil(padLength / chars.length)).slice(0, padLength);
     }
 
@@ -3462,7 +3462,7 @@
         case stringTag:
           // Coerce regexes to strings and treat strings primitives and string
           // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details.
-          return object == baseToString(other);
+          return object == (other + '');
       }
       return false;
     }