Add markers around generated code in error.c
diff --git a/scripts/data_files/error.fmt b/scripts/data_files/error.fmt
index 30ee257..413682f 100644
--- a/scripts/data_files/error.fmt
+++ b/scripts/data_files/error.fmt
@@ -63,7 +63,10 @@
 
         // High level error codes
         //
+        // BEGIN generated code
 HIGH_LEVEL_CODE_CHECKS
+        // END generated code
+
         if( strlen( buf ) == 0 )
             snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
     }
@@ -91,7 +94,10 @@
 
     // Low level error codes
     //
+    // BEGIN generated code
 LOW_LEVEL_CODE_CHECKS
+    // END generated code
+
     if( strlen( buf ) != 0 )
         return;