Compilation errors occur if UA_ENABLE_HISTORIZING is disabled

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Background Information / Reproduction Steps

To reproduce, turn off the UA_ENABLE_HISTORIZING cmake option and build the source. Client.h and ua_client_highlevel.c report a bunch of syntax errors due to still referencing history access functions.

Solution

To fix, add #ifdef UA_ENABLE_HISTORIZING to the 'Historical Access Service Set' section in client.h, and to the 'Historical Access' section in ua_client_highlevel.c.

Checklist

Please provide the following information:

• open62541 Version (release number or git tag): 1.4.1
• Other OPC UA SDKs used (client or server):
• Operating system: Windows 11
• Logs (with UA_LOGLEVEL set as low as necessary) attached
• Wireshark network dump attached
• Self-contained code example attached
• Critical issue