sprintf -> PyOS_snprintf in some "obviously safe" cases.
Also changed <>-style #includes to ""-style in some places where the
former didn't make sense.
diff --git a/Modules/pcremodule.c b/Modules/pcremodule.c
index e34c002..7a8900d 100644
--- a/Modules/pcremodule.c
+++ b/Modules/pcremodule.c
@@ -263,7 +263,8 @@
 	case('U'):    case('l'):    case('u'):
 	{
 		char message[50];
-		sprintf(message, "\\%c is not allowed", c);
+		PyOS_snprintf(message, sizeof(message),
+			      "\\%c is not allowed", c);
 		PyErr_SetString(ErrorObject, message);
 		return NULL;
 	}
@@ -495,7 +496,7 @@
 				if (result==Py_None)
 				{
 					char message[50];
-					sprintf(message, 
+					PyOS_snprintf(message, sizeof(message),
 						"group did not contribute to the match");
 					PyErr_SetString(ErrorObject, 
 							message);