various: fix shadow declarations [smatch scan]

various: fix shadow declarations [smatch scan]

libmount/src/tab.c:990:34: warning: symbol 'fs' shadows an earlier one
libmount/src/tab.c:970:26: originally declared here
misc-utils/findmnt.c:492:30: warning: symbol 'tmp' shadows an earlier one
misc-utils/findmnt.c:473:14: originally declared here
fdisks/fdiskdoslabel.c:211:36: warning: symbol 'pe' shadows an earlier one
fdisks/fdiskdoslabel.c:180:20: originally declared here
fdisks/fdiskdoslabel.c:639:34: warning: symbol 'i' shadows an earlier one
fdisks/fdiskdoslabel.c:578:16: originally declared here
fdisks/fdiskdoslabel.c:947:21: warning: symbol 'i' shadows an earlier one
fdisks/fdiskdoslabel.c:924:16: originally declared here
fdisks/fdiskdoslabel.c:976:29: warning: symbol 'i' shadows an earlier one
fdisks/fdiskdoslabel.c:924:16: originally declared here
fdisks/fdiskdoslabel.c:984:29: warning: symbol 'i' shadows an earlier one
fdisks/fdiskdoslabel.c:924:16: originally declared here

[kzak@redhat.com: - don't use local 'tmp' in findmnt.c]

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Signed-off-by: Karel Zak <kzak@redhat.com>