pgsql: Add an explicit cast to double when using fabs().

Add an explicit cast to double when using fabs(). Commit bc43b7c2c0 used fabs() directly on an int variable, which apparently requires an explicit cast on some platforms. Per buildfarm. Branch -- REL_11_STABLE Details ---

pgsql: Add an explicit cast to double when using fabs().

Add an explicit cast to double when using fabs(). Commit bc43b7c2c0 used fabs() directly on an int variable, which apparently requires an explicit cast on some platforms. Per buildfarm. Branch -- master Details ---

pgsql: Add an explicit cast to double when using fabs().

Add an explicit cast to double when using fabs(). Commit bc43b7c2c0 used fabs() directly on an int variable, which apparently requires an explicit cast on some platforms. Per buildfarm. Branch -- REL_13_STABLE Details ---

pgsql: Add an explicit cast to double when using fabs().

Add an explicit cast to double when using fabs(). Commit bc43b7c2c0 used fabs() directly on an int variable, which apparently requires an explicit cast on some platforms. Per buildfarm. Branch -- REL_12_STABLE Details ---

pgsql: Add an explicit cast to double when using fabs().

Add an explicit cast to double when using fabs(). Commit bc43b7c2c0 used fabs() directly on an int variable, which apparently requires an explicit cast on some platforms. Per buildfarm. Branch -- REL9_6_STABLE Details ---

pgsql: Add an explicit cast to double when using fabs().

Add an explicit cast to double when using fabs(). Commit bc43b7c2c0 used fabs() directly on an int variable, which apparently requires an explicit cast on some platforms. Per buildfarm. Branch -- REL_10_STABLE Details ---