Give type name when complaining about using input-only type for output

or v.v.

Tools/bgen/bgen/bgenType.py

@@ -115,7 +115,7 @@ class InputOnlyMixIn:
 	"Mix-in class to boobytrap passOutput"
 
 	def passOutput(self, name):
-		raise RuntimeError, "this type can only be used for input parameters"
+		raise RuntimeError, "Type '%s' can only be used for input parameters" % self.typeName
 
 class InputOnlyType(InputOnlyMixIn, Type):
 
@@ -126,7 +126,7 @@ class OutputOnlyMixIn:
 	"Mix-in class to boobytrap passInput"
 
 	def passInput(self, name):
-		raise RuntimeError, "this type can only be used for output parameters"
+		raise RuntimeError, "Type '%s' can only be used for output parameters" % self.typeName
 
 class OutputOnlyType(OutputOnlyMixIn, Type):