Preprocessor only fails if current document does not parse

Previously, preprocessor would not return successfully processed files
if an error was encountered with this file or any previous file. No the
preprocessor will only fail if the current processed file generates any
errors.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/api/wix/WixToolset.Extensibility/Services/IMessaging.cs b/src/api/wix/WixToolset.Extensibility/Services/IMessaging.cs
index fe77f2a4..15e17e63 100644
--- a/src/api/wix/WixToolset.Extensibility/Services/IMessaging.cs
+++ b/src/api/wix/WixToolset.Extensibility/Services/IMessaging.cs
@@ -16,6 +16,12 @@ namespace WixToolset.Extensibility.Services
         bool EncounteredError { get; }
 
         /// <summary>
+        /// Gets the number of errors encountered thus far.
+        /// </summary>
+        /// <value>The number of errors encountered.</value>
+        int ErrorCount { get; }
+
+        /// <summary>
         /// Gets the last error code encountered during messaging.
         /// </summary>
         /// <value>The exit code for the process.</value>