Revise error codes to have a reduced set exposed in the public API.

Fixes #2482

And also add proj_context_errno_string()

Revise gie 'expect failure errno XXXX' strings

1 files changed, 2 insertions, 8 deletions

diff --git a/src/internal.cpp b/src/internal.cpp
index 9cc48120..b96e2160 100644
--- a/src/internal.cpp
+++ b/src/internal.cpp
@@ -89,12 +89,9 @@ chained calls starting out with a call to its 2D interface.
             coo.lp = pj_inv (coo.xy, P);
             return coo;
         case PJ_IDENT:
-            return coo;
-        default:
             break;
     }
-    proj_errno_set (P, EINVAL);
-    return proj_coord_error ();
+    return coo;
 }
 
 
@@ -119,12 +116,9 @@ chained calls starting out with a call to its 3D interface.
             coo.lpz = pj_inv3d (coo.xyz, P);
             return coo;
         case PJ_IDENT:
-            return coo;
-        default:
             break;
     }
-    proj_errno_set (P, EINVAL);
-    return proj_coord_error ();
+    return coo;
 }
 
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