Fix compilation with GMX_USE_MUPARSER=None

Without muparser enabled, it is in invalid to catch its exception.

Related #4165

diff --git a/src/gromacs/pulling/transformationcoordinate.cpp b/src/gromacs/pulling/transformationcoordinate.cpp
index cc52053af58b78fd2f3109ccd57694f70e9cb2d8..5271e397d08074b0a6f14f9bf2b292da9eee140a 100644 (file)
--- a/src/gromacs/pulling/transformationcoordinate.cpp
+++ b/src/gromacs/pulling/transformationcoordinate.cpp
@@ -62,6 +62,7 @@ double getTransformationPullCoordinateValue(pull_coord_work_t* coord)
     {
         result = coord->expressionParser.evaluate(coord->transformationVariables);
     }
+#if HAVE_MUPARSER
     catch (mu::Parser::exception_type& e)
     {
         GMX_THROW(InternalError(
@@ -69,6 +70,7 @@ double getTransformationPullCoordinateValue(pull_coord_work_t* coord)
                              transformationPullCoordinateIndex + 1,
                              e.GetMsg().c_str())));
     }
+#endif
     catch (std::exception& e)
     {
         GMX_THROW(InternalError(