== on Real is illegal Modelica

[maltelenz]

In these two lines, == is used on Reals, which is not legal Modelica:

ThermoPower/ThermoPower/Water.mo

Lines 3856 to 3858 in d028b9e

	gml = if gl == 0 then 0 else 1/(1/gl + a*rint/lm)
	"Total Heat conductance metal-liquid";
	gmv = if gv == 0 then 0 else 1/(1/gv + a*rint/lm)