Fix issue #37, handle simple identifier in FOR init

CHANGES

@@ -1,5 +1,8 @@
 Change History
 ==============
+0.7.x (unreleased)
+- Bug fix (simple identifier in FOR init): https://github.com/rspivak/slimit/issues/37
+
 0.7.4 (2012-06-5)
 ------------------
 - Bug fix: https://github.com/rspivak/slimit/issues/34

src/slimit/tests/test_parser.py

@@ -193,6 +193,18 @@ class ASITestCase(unittest.TestCase):
          """
          for ( ; i < length; i++) {
 
+         }
+         """),
+
+        ("""
+        var i;
+        for (i; i < length; i++) {
+        }
+        """,
+         """
+         var i;
+         for (i; i < length; i++) {
+
          }
          """),
         ]

src/slimit/visitors/ecmavisitor.py

@@ -138,7 +138,7 @@ def visit_For(self, node):
         if node.init is None:
             s += ' ; '
         elif isinstance(node.init, (ast.Assign, ast.Comma, ast.FunctionCall,
-                                    ast.UnaryOp)):
+                                    ast.UnaryOp, ast.Identifier)):
             s += '; '
         else:
             s += ' '