Initialize the iov_count, this crashes static write/read in certain platforms while decoding datatype

This commit was SVN r27273.

ompi/mca/fcoll/static/fcoll_static_file_read_all.c

@@ -78,7 +78,7 @@ mca_fcoll_static_file_read_all (mca_io_ompio_file_t *fh,
   MPI_Aint *memory_displacements=NULL;
   int bytes_to_read_in_cycle=0;
   size_t max_data=0, bytes_per_cycle=0;
-  uint32_t iov_count, iov_index=0;
+  uint32_t iov_count=0, iov_index=0;
   struct iovec *decoded_iov=NULL, *iov=NULL;
   local_io_array *local_iov_array=NULL, *global_iov_array=NULL;
   local_io_array *file_offsets_for_agg=NULL;

ompi/mca/fcoll/static/fcoll_static_file_write_all.c

@@ -67,7 +67,7 @@ mca_fcoll_static_file_write_all (mca_io_ompio_file_t *fh,
   
   size_t max_data = 0, bytes_per_cycle=0;
   struct iovec *iov=NULL, *decoded_iov=NULL;
-  uint32_t iov_count, iov_index=0;
+  uint32_t iov_count=0, iov_index=0;
   int i=0,j=0,l=0, temp_index;
   int ret=OMPI_SUCCESS, cycles, local_cycles, *bytes_per_process=NULL;
   int index, *disp_index=NULL, **blocklen_per_process=NULL;