Revert r56044 (which changed the %c format specifier to accept a

unicode char into an int variable) and add %C which does this.

Python/modsupport.c

@@ -384,6 +384,12 @@ do_mkvalue(const char **p_format, va_list *p_va, int flags)
 #endif /* WITHOUT_COMPLEX */
 
 		case 'c':
+		{
+			char p[1];
+			p[0] = (char)va_arg(*p_va, int);
+			return PyString_FromStringAndSize(p, 1);
+		}
+		case 'C':
 		{
 			int i = va_arg(*p_va, int);
 			Py_UNICODE c;