Fix syntax error when preprocessor macros are defined inside of enum lists

Fixes SF Bug 428, Patch 333

Examples/test-suite/enum_macro.i

@@ -0,0 +1,92 @@
+%module enum_macro
+
+%inline %{
+enum Greeks1
+{
+#define GREEK1 -1
+    alpha1=1,
+    beta1,
+    theta1
+};
+
+enum Greeks2
+{
+    alpha2 = 2,
+#define GREEK2 -2
+    beta2,
+    theta2
+};
+
+enum Greeks3
+{
+    alpha3,
+    beta3,
+#define GREEK3 -3
+    theta3
+};
+
+enum Greeks4
+{
+    alpha4 = 4,
+    beta4 = 5,
+    theta4 = 6
+#define GREEK4 -4
+};
+
+enum Greeks5
+{
+#define GREEK5 -5
+    alpha5,
+    beta5,
+};
+
+enum Greeks6
+{
+    alpha6,
+#define GREEK6 -6
+    beta6,
+};
+
+enum Greeks7
+{
+    alpha7,
+    beta7,
+#define GREEK7 -7
+};
+
+enum Greeks8
+{
+#define GREEK8 -8
+    theta8
+};
+
+enum Greeks9
+{
+    theta9
+#define GREEK9 -9
+};
+
+enum Greeks10
+{
+#define GREEK10 -10
+    theta10,
+};
+
+enum Greeks11
+{
+    theta11,
+#define GREEK11 -11
+};
+
+typedef enum {
+    theta12 = 0
+#define GREEK12 -12
+} Greeks12;
+%}
+
+
+enum Greeks13
+{
+#define GREEK13 -13
+};
+