cobol: sqrt(0) is not an ec-argument error. [PR119885] libgcobol PR cobol/119885 * intrinsic.cc: (__gg__sqrt): Change test from <= zero to < zero. gcc/testsuite * cobol.dg/group2/FUNCTION_SQRT__2_.cob: Testcase. * cobol.dg/group2/FUNCTION_SQRT__2_.out: Known-good for the testcase. (cherry picked from commit d44beb132850a8ced1b0614e2724f18465b4a737)