Added function cdiInqProj().

src/cdi.h

@@ -720,6 +720,9 @@ void    gridDestroy(int gridID);
 /*      gridDuplicate: Duplicate a Grid */
 int     gridDuplicate(int gridID);
 
+/*      gridInqProj: Get the projection ID of a Grid */
+int     gridInqProj(int gridID);
+
 /*      gridInqType: Get the type of a Grid */
 int     gridInqType(int gridID);
 

src/grid.c

@@ -992,6 +992,13 @@ void gridInqYstdname(int gridID, char *ystdname)
     ystdname[0] = 0;
 }
 
+int gridInqProj(int gridID)
+{
+  grid_t *gridptr = gridID2Ptr(gridID);
+
+  return gridptr->proj;
+}
+
 /*
 @Function  gridInqType
 @Title     Get the type of a Grid