add the testchar to 'make check' Volker Grabsch pointed out a typo

* Makefile.am: add the testchar to 'make check'
* xmlschemas.c: Volker Grabsch pointed out a typo
* xmlregexp.c: production [19] from XML Schemas regexps were a
  mistake removed in version REC-xmlschema-2-20041028, Volker Grabsch
  provided a patch to remove it
* test/schemas/regexp-char-ref_0.xml test/schemas/regexp-char-ref_0.xsd
  test/schemas/regexp-char-ref_1.xsd result/schemas/regexp-char-ref_0_0
  result/schemas/regexp-char-ref_1_0: Volker Grabsch also provided
  regession tests for this
Daniel

svn path=/trunk/; revision=3776
diff --git a/xmlschemas.c b/xmlschemas.c
index e8a603c..03c0b02 100644
--- a/xmlschemas.c
+++ b/xmlschemas.c
@@ -15092,7 +15092,7 @@
 	xmlSchemaPCustomErr(ctxt,
 	    XML_SCHEMAP_ST_PROPS_CORRECT_1,
 	    WXS_BASIC_CAST type, NULL,
-	    "A type, derived by list or union, must have"
+	    "A type, derived by list or union, must have "
 	    "the simple ur-type definition as base type, not '%s'",
 	    xmlSchemaGetComponentQName(&str, baseType));
 	FREE_AND_NULL(str)