Fix result duplicate rows issue

Author: malthe

CHANGES.md

@@ -1,5 +1,7 @@
 In next release ...
 
+- Fix issue where larger results would sometimes have duplicates (#122).
+
 - Fixed an issue where the result row array type would use the record generic
   as the value type instead of `any` which was incorrect.
 

src/client.ts

@@ -935,6 +935,7 @@ export class ClientImpl {
 
                     // Keep track of how much data we've consumed.
                     frame += bytes;
+                    read += bytes;
 
                     // If the next message header doesn't fit, we
                     // break out and wait for more data to arrive.
@@ -943,8 +944,6 @@ export class ClientImpl {
                         this.expect = 5;
                         return read;
                     }
-
-                    read += bytes;
                 }
 
                 this.activeRow = null;