small change.

git-svn-id: https://dune.mathematik.uni-freiburg.de/svn/alugrid/trunk@1147 0d966ed9-3843-0410-af09-ebfb50bd7c74

src/serial/parallel.h

@@ -25,7 +25,7 @@ class Parallel {
           if(_buff) 
           {
             BufferType& buff = *_buff;
-            if(size > buff.size()) buff.resize(size);
+            if(size != buff.size()) buff.resize(size);
             // reset read and write counters 
             for(size_t i=0; i<size; ++i) buff[i].clear();
           }