Fix issue 1463

[NAThompson]

No description provided.

[NAThompson]

@dschmitz89: I should have a fix in a minute-just submitted a failing unit test first because my clang is broken locally.

Closes #1463

[NAThompson]

Build from commit 1 fails with:

====== BEGIN OUTPUT ======
Running 1 test case...
Tests run with GNU C++ version 12.3.0, GNU libstdc++ version 20230510, linux
Testing spot values with type float (Tolerance = 1.19209e-05%).
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{3.40282e+38} between P + Q{0} and RealType(1){1} exceeds 0.00119209%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{3.40282e+38} between P + Q{0} and RealType(1){1} exceeds 0.00119209%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{3.40282e+38} between P + Q{0} and RealType(1){1} exceeds 0.00119209%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{3.40282e+38} between P + Q{0} and RealType(1){1} exceeds 0.00119209%
Testing spot values with type double (Tolerance = 2.22045e-14%).
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.79769e+308} between P + Q{0} and RealType(1){1} exceeds 0.0001%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.79769e+308} between P + Q{0} and RealType(1){1} exceeds 0.0001%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.79769e+308} between P + Q{0} and RealType(1){1} exceeds 0.0001%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.79769e+308} between P + Q{0} and RealType(1){1} exceeds 0.0001%
Testing spot values with type long double (Tolerance = 1.0842e-17%).
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.18973e+4932} between P + Q{0} and RealType(1){1} exceeds 0.0001%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.18973e+4932} between P + Q{0} and RealType(1){1} exceeds 0.0001%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.18973e+4932} between P + Q{0} and RealType(1){1} exceeds 0.0001%
libs/math/test/test_nc_f.cpp(341): error: in "test_main": difference{1.18973e+4932} between P + Q{0} and RealType(1){1} exceeds 0.0001%

*** 12 failures are detected in the test module "Master Test Suite"

[NAThompson]

@mborland : I think this fix is pretty trivial but do you wanna set your Fable on it?