Reset the start of the enum to 0.

We must make the initial value of enum to zero because some places
check number of packet types by checking ending type value.
Signed-off-by: Pavan Balaji <balaji@anl.gov>

src/mpid/ch3/include/mpidpkt.h

@@ -62,7 +62,7 @@ typedef union {
 /* FIXME: Having predefined names makes it harder to add new message types,
    such as different RMA types. */
 typedef enum {
-    MPIDI_CH3_PKT_EAGER_SEND = 42,
+    MPIDI_CH3_PKT_EAGER_SEND = 0,
 #if defined(USE_EAGER_SHORT)
     MPIDI_CH3_PKT_EAGERSHORT_SEND,
 #endif /* defined(USE_EAGER_SHORT) */