Fix message length calculation for arrays of size 1 (issue #253)

diff --git a/generator/nanopb_generator.py b/generator/nanopb_generator.py
index 359e184..42669ac 100755 (executable)
--- a/generator/nanopb_generator.py
+++ b/generator/nanopb_generator.py
@@ -649,9 +649,14 @@ class Field:
         if self.rules == 'REPEATED':
             # Decoders must be always able to handle unpacked arrays.
             # Therefore we have to reserve space for it, even though
         if self.rules == 'REPEATED':
             # Decoders must be always able to handle unpacked arrays.
             # Therefore we have to reserve space for it, even though

-            # we emit packed arrays ourselves.
+            # we emit packed arrays ourselves. For length of 1, packed
+            # arrays are larger however so we need to add allowance
+            # for the length byte.

             encsize *= self.max_count
 
             encsize *= self.max_count
 

+            if self.max_count == 1:
+                encsize += 1
+

         return encsize
 
 
         return encsize