Invalid GLSL produced from valid SPIRV

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Decompiling valid SPIRV results in invalid GLSL.

```
$ spirv-cross --stage comp --version 460 --vulkan-semantics lumen.spirv --output out.glsl

$ glslangValidator -g -V -S comp --target-env spirv1.6 out.glsl
out.glsl
ERROR: out.glsl:317: 'ShadowTraces' : undeclared identifier
ERROR: out.glsl:317: '_m0' : unknown swizzle selection
ERROR: out.glsl:317: '_m0' : unknown swizzle selection
ERROR: out.glsl:317: '_m0' : unknown swizzle selection
ERROR: out.glsl:317: '=' : cannot convert from ' temp float' to ' temp highp uint'
ERROR: out.glsl:317: '' : compilation terminated
ERROR: 6 compilation errors. No code generated.

SPIR-V is not generated for failed compile or link
```

Tested on
```
$ ./glslangValidator --version
Glslang Version: 11:15.0.0
ESSL Version: OpenGL ES GLSL 3.20 glslang Khronos. 15.0.0
GLSL Version: 4.60 glslang Khronos. 15.0.0
SPIR-V Version 0x00010600, Revision 1
GLSL.std.450 Version 100, Revision 1
Khronos Tool ID 8
SPIR-V Generator Version 11
GL_KHR_vulkan_glsl version 100
ARB_GL_gl_spirv version 100

$ ./spirv-cross --version
Git commit: vulkan-sdk-1.3.296.0-10-g36e54568 Timestamp: 2024-10-14T16:18:23
```

[lumen_spirv.txt](https://github.com/user-attachments/files/17366129/lumen_spirv.txt)
[out_glsl.txt](https://github.com/user-attachments/files/17366141/out_glsl.txt)

Start by reproducing the report with lumen_spirv.txt, the spirv-cross command, and glslangValidator, then compare the generated out.glsl at line 317 with the validator errors. Trace how the invalid ShadowTraces expression is produced and verify that the corrected output compiles successfully with the reported validation command.

Written by the indexing model from the issue text.