Add missing IsArm64 checks to the Arm64EC dlls. Still installing x64 versions on Arm64 since it can use them (after manually deleting the Arm64EC ones).

setup.iss

@@ -146,8 +146,8 @@ Source: "files\isbzip{#dasharch}.dll.issig"; DestDir: "{app}"; Flags: ignorevers
 Source: "files\islzma{#dasharch}.dll"; DestDir: "{app}"; Flags: ignoreversion issigverify signcheck touch
 Source: "files\islzma{#dasharch}.dll.issig"; DestDir: "{app}"; Flags: ignoreversion touch
 #ifdef x64
-Source: "files\islzma-Arm64EC.dll"; DestDir: "{app}"; Flags: ignoreversion issigverify signcheck touch
-Source: "files\islzma-Arm64EC.dll.issig"; DestDir: "{app}"; Flags: ignoreversion touch
+Source: "files\islzma-Arm64EC.dll"; DestDir: "{app}"; Flags: ignoreversion issigverify signcheck touch; Check: IsArm64
+Source: "files\islzma-Arm64EC.dll.issig"; DestDir: "{app}"; Flags: ignoreversion touch; Check: IsArm64
 #else
 Source: "files\islzma32.exe"; DestDir: "{app}"; Flags: ignoreversion issigverify signcheck touch
 Source: "files\islzma32.exe.issig"; DestDir: "{app}"; Flags: ignoreversion touch