[fs] fix crash on '#' comments in pchtxt patches (#4124)

Adds `#` as a valid pchtxt comment, and fixes a crash that could occur
when using odd-length values

This patch was sent by Adam Kittelson <adam@apathydrive.com>

Signed-off-by: crueter <crueter@eden-emu.dev>
Co-authored-by: Cole Avenue <cole@melisand.re>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4124
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

src/core/file_sys/ips_layer.cpp

@@ -256,7 +256,7 @@ void IPSwitchCompiler::Parse() {
                 const auto& patch_line = lines[++i];
 
                 // Patch line may contain comments
-                if (StartsWith(patch_line, "//")) {
+                if (StartsWith(patch_line, "//") || StartsWith(patch_line, "#")) {
                     continue;
                 }