SetVariantString uses string by reference

[Alienmario]

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SourceMod Version: 1.12.0.7031

Description

SetVariantString will keep a reference to Sourcepawn string variable, instead of copying its value.
Not sure if this is intentional, if it is, should probably be specified in the docs.

Problematic Code (or Steps to Reproduce)

The following results in both the input and variant being "IgniteLifetime"
The expected behavior is variant being "2".

char buffer[128];
buffer = "2";
SetVariantString(buffer);
buffer = "IgniteLifetime";
AcceptEntityInput(entity, buffer);