OSHMEM: fix compiler warnings

fixed by Roman, reviewed by Miked

cmr=v1.8.2:reviewer=ompi-rm1.8

This commit was SVN r31880.

examples/oshmem_max_reduction.c

@@ -48,7 +48,7 @@ int  main(void)
     printf("%d/%d dst =", my_pe, num_pes);
 
     for (i = 0; i < N; i+= 1) {
-        printf(" %d", dst[i]);
+        printf(" %ld", dst[i]);
     }
 
     printf("\n");

examples/ring_oshmem_c.c

@@ -14,7 +14,7 @@
 int main (int argc, char * argv[])
 {
     static int rbuf = -1;
-    int proc, nproc, next, prev;
+    int proc, nproc, next;
     int message = 10;
 
     start_pes(0);