Per #2106, not including 'shape' in the shared variable list causes a…

… compilation error in GCC9.

data_plane_util.cc:262:36: error: "shape" not specified in enclosing "parallel"

However, including it causes a compilation error in GCC8!

data_plane_util.cc:257:38: error: 'shape' is predetermined 'shared' for 'shared'
    private(x, y, n_vld, n_thr, gp, v)

Try making "shape" non-const to see if that sidesteps the GCC8 issue.

met/src/basic/vx_util/data_plane_util.cc

@@ -30,7 +30,6 @@ using namespace std;
 
 #include "GridTemplate.h"
 
-
 ////////////////////////////////////////////////////////////////////////
 //
 // Utility functions operating on a DataPlane
@@ -206,7 +205,7 @@ DataPlane smooth_field(const DataPlane &dp,
 ////////////////////////////////////////////////////////////////////////
 
 void fractional_coverage(const DataPlane &dp, DataPlane &frac_dp,
-        int width, const GridTemplateFactory::GridTemplates shape,
+        int width, GridTemplateFactory::GridTemplates shape,
         bool wrap_lon, SingleThresh t,
         const DataPlane *cmn, const DataPlane *csd, double vld_t) {
    GridPoint *gp = NULL;

met/src/basic/vx_util/data_plane_util.h

@@ -51,7 +51,7 @@ extern DataPlane smooth_field(const DataPlane &dp,
                     bool wrap_lon, double t, const GaussianInfo &gaussian);
 
 extern void fractional_coverage(const DataPlane &dp, DataPlane &frac_dp,
-               int width, const GridTemplateFactory::GridTemplates shape,
+               int width, GridTemplateFactory::GridTemplates shape,
                bool wrap_lon, SingleThresh t,
                const DataPlane *cmn, const DataPlane *csd, double vld_t);