Fix some issues raised by latest cppcheck

- coordinateoperation_internal.hpp: missing 'explicit' keyword
- proj.cpp: unused 'generic' member in enumeration
- init.cpp: useless assignment to a_orig and es_orig, because done again a
            few lines below.
- crs.cpp: unused variable
- datum.cpp: inefficient use of find() function
- io.cpp:
  * missing 'static' qualifier for method
  * useles ternary test (left and right have same value)
- aeqd.cpp: useless assignment of inv and fwd, snice done again a few lines
            below
- isea.cpp: useless assignment of resolution and aperture since done again a
            few lines below, and with default values when params are absent
- mod_ster.cpp: useless assignment of lp.lam, overriden in below code paths.
- stere.cpp: false positive, but better not modify another variable than the
             iterator in a for() loop.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 13ea4ae8..1c0eddf0 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -673,8 +673,8 @@ pj_init_ctx_with_allow_init_epsg(projCtx ctx, int argc, char **argv, int allow_i
             if (PJD_ERR_MAJOR_AXIS_NOT_GIVEN==proj_errno (PIN))
                 proj_errno_reset (PIN);
             PIN->f = 1.0/298.257223563;
-            PIN->a_orig  = PIN->a  = 6378137.0;
-            PIN->es_orig = PIN->es = PIN->f*(2-PIN->f);
+            PIN->a  = 6378137.0;
+            PIN->es = PIN->f*(2-PIN->f);
         }
     }
     PIN->a_orig = PIN->a;