games/super_methane_brothers: use clang and unbreak with gcc5 or later

sources/misc.cpp:43:65: error: narrowing conversion of '4294967248u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_0c = {SPR_ENDSPR_1+0x0c,0x0020,0xFFFFFFD0};

^

sources/misc.cpp:46:65: error: narrowing conversion of '4294967282u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_0f = {SPR_ENDSPR_1+0x0f,0x005E,0xFFFFFFF2};

^

sources/misc.cpp:47:65: error: narrowing conversion of '4294967290u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_10 = {SPR_ENDSPR_1+0x10,0x007E,0xFFFFFFFA};

^

sources/misc.cpp:48:65: error: narrowing conversion of '4294967289u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_11 = {SPR_ENDSPR_1+0x11,0x008E,0xFFFFFFF9};

^

sources/misc.cpp:50:65: error: narrowing conversion of '4294967291u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_13 = {SPR_ENDSPR_1+0x13,0x00B2,0xFFFFFFFB};

^

sources/misc.cpp:51:65: error: narrowing conversion of '4294967290u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_14 = {SPR_ENDSPR_1+0x14,0x00C2,0xFFFFFFFA};

^

sources/misc.cpp:60:65: error: narrowing conversion of '4294967280u' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
static PARTYOFFS party_1d = {SPR_ENDSPR_1+0x1d,0x0030,0xFFFFFFF0};

^

PR: 216707
Reported by: antoine (via exp-run)