fix compilation warnings

Author: wkliao

examples/adios/read_metadata.c

@@ -130,6 +130,6 @@ int main(int argc, char** argv) {
 
     MPI_Finalize();
 
-    return 0;
+    return (nerrs > 0);
 }
 

test/testcases/put_all_kinds.m4

@@ -233,9 +233,9 @@ int test_io(const char *out_path,
     for (k=0; k<count[0]; k++)
     for (j=0; j<count[1]; j++)
     for (i=0; i<count[2]; i++) {
-        int val = (start[0]+k)*gsize[1]*gsize[2]
-                + (start[1]+j)*gsize[2]
-                + (start[2]+i); // + 1000*(rank+1);
+        MPI_Offset val = (start[0]+k)*gsize[1]*gsize[2]
+                       + (start[1]+j)*gsize[2]
+                       + (start[2]+i); // + 1000*(rank+1);
         buf[k*count[1]*count[2] + j*count[2] + i] = (double)(val % 128);
     }
     cbuf = (char *) malloc(bufsize);

test/testcases/tst_redefine.c

@@ -73,8 +73,8 @@ static int verbose;
 static int
 check_vars(MPI_Comm comm, int ncid, int *varid, int coll_io)
 {
-    int i, j, nerrs=0, err, rank, *buf[4], bufLen[4], nvars, off_val;
-    MPI_Offset start[2], count[2];
+    int i, j, nerrs=0, err, rank, *buf[4], nvars, off_val;
+    MPI_Offset start[2], count[2], bufLen[4];
 
     MPI_Comm_rank(comm, &rank);
 
@@ -294,9 +294,9 @@ tst_fmt(const char *out_path,
         MPI_Offset *info_align) /* [3] 0 means unset in MPI info */
 {
     int i, rank, nprocs, ncid, err, nerrs=0;
-    int *buf[4], bufLen[4], dimid[3], varid[4];
+    int *buf[4], dimid[3], varid[4];
     MPI_Info info=MPI_INFO_NULL;
-    MPI_Offset start[2], count[2], increment, fix_v_size;
+    MPI_Offset bufLen[4], start[2], count[2], increment, fix_v_size;
 
     MPI_Offset hsize=0, old_hsize=-1, exp_hsize=-1;
     MPI_Offset extent=0, old_extent=-1, exp_extent=-1;