do not show spurious warnings about missing library deps

Author: kripken

src/jsifier.js

@@ -408,7 +408,7 @@ function JSify(data, functionsOnly, givenFunctions) {
       var redirectedIdent = null;
       var deps = LibraryManager.library[ident + '__deps'] || [];
       deps.forEach(function(dep) {
-        if (!(dep in LibraryManager.library)) warn('missing library dependency ' + dep + ', make sure you are compiling with the right options (see #ifdefs in src/library*.js)');
+        if (typeof snippet === 'string' && !(dep in LibraryManager.library)) warn('missing library dependency ' + dep + ', make sure you are compiling with the right options (see #ifdefs in src/library*.js)');
       });
       var isFunction = false;