Fix initialized memory. Count the number of failures in shm-closing

functions and return it.


vio/viosocket.c:
  Initialize the return code and set it according to errors in the closing 
  functions.

vio/viosocket.c

@@ -545,9 +545,13 @@ int vio_write_shared_memory(Vio * vio, const gptr buf, int size)
 }
 
 
+/**
+ Close shared memory and DBUG_PRINT any errors that happen on closing.
+ @return Zero if all closing functions succeed, and nonzero otherwise.
+*/
 int vio_close_shared_memory(Vio * vio)
 {
-  int r;
+  int error_count= 0;
   DBUG_ENTER("vio_close_shared_memory");
   if (vio->type != VIO_CLOSED)
   {
@@ -561,23 +565,44 @@ int vio_close_shared_memory(Vio * vio)
       result if they are success.
     */
     if (UnmapViewOfFile(vio->handle_map) == 0) 
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("UnmapViewOfFile() failed"));
+    }
     if (CloseHandle(vio->event_server_wrote) == 0)
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("CloseHandle(vio->esw) failed"));
+    }
     if (CloseHandle(vio->event_server_read) == 0)
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("CloseHandle(vio->esr) failed"));
+    }
     if (CloseHandle(vio->event_client_wrote) == 0)
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("CloseHandle(vio->ecw) failed"));
+    }
     if (CloseHandle(vio->event_client_read) == 0)
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("CloseHandle(vio->ecr) failed"));
+    }
     if (CloseHandle(vio->handle_file_map) == 0)
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("CloseHandle(vio->hfm) failed"));
+    }
     if (CloseHandle(vio->event_conn_closed) == 0)
+    {
+      error_count++;
       DBUG_PRINT("vio_error", ("CloseHandle(vio->ecc) failed"));
+    }
   }
   vio->type= VIO_CLOSED;
   vio->sd=   -1;
-  DBUG_RETURN(!r);
+  DBUG_RETURN(error_count);
 }
 #endif /* HAVE_SMEM */
 #endif /* __WIN__ */