Warnings during build of plugins: mem.h: warning: left shift count >= width of type [-Wshift-count-overflow]

[barracuda156]

Describe the bug
During the build of audacious-plugins there are a number of shift-count-overflow warnings:

In file included from ../audacious-plugins-4.3.1/src/xsf/desmume/MMU.h:23,
                 from ../audacious-plugins-4.3.1/src/xsf/desmume/armcpu.h:23,
                 from ../audacious-plugins-4.3.1/src/xsf/desmume/cp15.h:21,
                 from ../audacious-plugins-4.3.1/src/xsf/desmume/bios.cc:20:
../audacious-plugins-4.3.1/src/xsf/desmume/mem.h: In function 'uint64_t T1ReadQuad(const uint8_t*, uint32_t)':
../audacious-plugins-4.3.1/src/xsf/desmume/mem.h:83:31: warning: left shift count >= width of type [-Wshift-count-overflow]
   83 |         return (mem[addr + 7] << 56) | (mem[addr + 6] << 48) | (mem[addr + 5] << 40) | (mem[addr + 4] << 32) | (mem[addr + 3] << 24) | (mem[addr + 2] << 16) | (mem[addr + 1] << 8)  | mem[addr];
      |                 ~~~~~~~~~~~~~~^~~~~
../audacious-plugins-4.3.1/src/xsf/desmume/mem.h:83:55: warning: left shift count >= width of type [-Wshift-count-overflow]
   83 |         return (mem[addr + 7] << 56) | (mem[addr + 6] << 48) | (mem[addr + 5] << 40) | (mem[addr + 4] << 32) | (mem[addr + 3] << 24) | (mem[addr + 2] << 16) | (mem[addr + 1] << 8)  | mem[addr];
      |                                         ~~~~~~~~~~~~~~^~~~~
../audacious-plugins-4.3.1/src/xsf/desmume/mem.h:83:79: warning: left shift count >= width of type [-Wshift-count-overflow]
   83 |         return (mem[addr + 7] << 56) | (mem[addr + 6] << 48) | (mem[addr + 5] << 40) | (mem[addr + 4] << 32) | (mem[addr + 3] << 24) | (mem[addr + 2] << 16) | (mem[addr + 1] << 8)  | mem[addr];
      |                                                                 ~~~~~~~~~~~~~~^~~~~
../audacious-plugins-4.3.1/src/xsf/desmume/mem.h:83:103: warning: left shift count >= width of type [-Wshift-count-overflow]
   83 |         return (mem[addr + 7] << 56) | (mem[addr + 6] << 48) | (mem[addr + 5] << 40) | (mem[addr + 4] << 32) | (mem[addr + 3] << 24) | (mem[addr + 2] << 16) | (mem[addr + 1] << 8)  | mem[addr];
      |                                                                                         ~~~~~~~~~~~~~~^~~~~

While this is a warning and not an error, it may still be of concern.

Steps to reproduce
Build audacious-plugins on a 32-bit platform.

Expected behavior
It should build clean.

Additional information

• Audacious version and interface (Qt / GTK / Winamp)
  4.3.1 +gtk3
• Operating system and version
  MacOS 10.6 ppc
• Desktop environment
  MacPorts