Fix: Fixed workspace size in for triangle BwdTrans

Issue/feature addressed

The workspace size for the triangle BwdTrans operator is incorrect in both the StdRegions and Collection implementations

Proposed solution

Workspace size changed from nquad0nmode1 per element to nquad1nmode0 per element

Implementation

Edits in files StdRegions/StdTriExp.cpp and Collections/BwdTrans.cpp

Tests

Suggested reviewers

Please suggest any people who would be appropriate to review your code.

Notes

Please add any other information that could be useful for reviewers.

Checklist

• Functions and classes, or changes to them, are documented.
• [ ] User guide/documentation is updated.
• Changelog is updated.
• [ ] Suitable tests added for new functionality.
• Contributed code is correctly formatted. (See the contributing guidelines).
• [ ] License added to any new files.
• [ ] No extraneous files have been added (e.g. compiler output or test data files).

library/Collections/BwdTrans.cpp

@@ -707,7 +707,7 @@ private:
           m_base0(m_stdExp->GetBasis(0)->GetBdata()),
           m_base1(m_stdExp->GetBasis(1)->GetBdata())
     {
-        m_wspSize = m_nquad0 * m_nmodes1 * m_numElmt;
+        m_wspSize = m_nquad1 * m_nmodes0 * m_numElmt;
         if (m_stdExp->GetBasis(0)->GetBasisType() == LibUtilities::eModified_A)
         {
             m_sortTopVertex = true;