extra python_wrapper change needed for last patch

src/my_pool_chunk.h

@@ -33,7 +33,7 @@ methods:
                      minchunk <= N <= maxchunk required
    put(index) = return indexed chunk to pool (same index returned by get)
    int size() = return total size of allocated pages in bytes
-public varaibles:
+public variables:
    ndatum = total # of stored datums
    nchunk = total # of stored chunks
    size = total size of all allocated pages in daums

src/python_wrapper.h

@@ -38,7 +38,7 @@ class Python {
   void invoke_function(int, char *) {}
   int find(char *) {return -1;}
   int variable_match(char *, char *, int) {return -1;}
-
+  char *long_string(int) {return NULL;}
 };
 
 }