Auto merge of #33798 - locallycompact:lc/misleading-intentation, r=alexcrichton

Auto merge of #33798 - locallycompact:lc/misleading-intentation, r=alexcrichton

Fix misleading intentation errors on gcc 6.0

Currently building with latest gcc results in the following error:

    compile: x86_64-unknown-linux-gnu/rt/miniz.o
    /home/lc/rust/src/rt/miniz.c: In function ‘tinfl_decompress’:
    /home/lc/rust/src/rt/miniz.c:578:9: error: this ‘for’ clause does not guard... [-Werror=misleading-indentation]
             for ( i = 0; i <= 143; ++i) *p++ = 8; for ( ; i <= 255; ++i) *p++ = 9; for ( ; i <= 279; ++i) *p++ = 7; for ( ; i <= 287; ++i) *p++ = 8;
             ^~~
    /home/lc/rust/src/rt/miniz.c:578:47: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’
             for ( i = 0; i <= 143; ++i) *p++ = 8; for ( ; i <= 255; ++i) *p++ = 9; for ( ; i <= 279; ++i) *p++ = 7; for ( ; i <= 287; ++i) *p++ = 8;
                                                   ^~~
    /home/lc/rust/src/rt/miniz.c: In function ‘tdefl_find_match’:
    /home/lc/rust/src/rt/miniz.c:1396:5: error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
         if (!dist) break; p = s; q = d->m_dict + probe_pos; for (probe_len = 0; probe_len < max_match_len; probe_len++) if (*p++ != *q++) break;
         ^~
    /home/lc/rust/src/rt/miniz.c:1396:23: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
         if (!dist) break; p = s; q = d->m_dict + probe_pos; for (probe_len = 0; probe_len < max_match_len; probe_len++) if (*p++ != *q++) break;
                           ^

This patch stops this.