[Python] Deal with an integer as the default value of a bool

parameter in the C++ prototype.  Fixes github #327, reported by
Greg Allen.

CHANGES.current

@@ -5,6 +5,11 @@ See the RELEASENOTES file for a summary of changes in each release.
 Version 3.0.6 (in progress)
 ===========================
 
+2015-05-07: olly
+	    [Python] Deal with an integer as the default value of a bool
+	    parameter in the C++ prototype.  Fixes github #327, reported by
+	    Greg Allen.
+
 2015-05-07: LindleyF
 	    [Java] Allow feature("director") and feature("ref") to be used
 	    together.  Github PR#403.

Examples/test-suite/default_arg_values.i

@@ -6,6 +6,8 @@ struct Display {
   // Bad Python wrappers were being generated when NULL used for primitive type
   float draw1(float v = 0) { return v; }
   float draw2(float *v = 0) { return v ? *v : 0; }
+  bool bool0(bool x = 0) { return x; }
+  bool bool1(bool x = 1) { return x; }
 };
 float* createPtr(float v) { static float val; val = v; return &val; }
 %}
@@ -14,5 +16,7 @@ struct Display {
   // Bad Python wrappers were being generated when NULL used for primitive type
   float draw1(float v = NULL) { return v; }
   float draw2(float *v = NULL) { return v ? *v : 0; }
+  bool bool0(bool x = 0) { return x; }
+  bool bool1(bool x = 1) { return x; }
 };
 float* createPtr(float v) { static float val; val = v; return &val; }

Examples/test-suite/python/default_arg_values_runme.py

@@ -15,3 +15,8 @@ if d.draw2() != 0:
 if d.draw2(p) != 123:
   raise RuntimeError
 
+if d.bool0() != False or type(d.bool0()) != type(False):
+    raise RuntimeError
+
+if d.bool1() != True or type(d.bool1()) != type(True):
+    raise RuntimeError

Source/Modules/python.cxx

@@ -1927,6 +1927,10 @@ public:
 	}
       }
 
+      // Allow integers as the default value for a bool parameter.
+      if (Cmp(t, "bool") == 0)
+	return NewString(value ? "True" : "False");
+
       // Deal with the values starting with 0 first as they can be octal or
       // hexadecimal numbers or even pointers.
       if (s[0] == '0') {