build: Silence two compiler warnings.

--

g10/keylist.c

@@ -1682,7 +1682,7 @@ list_keyblock_colon (ctrl_t ctrl, kbnode_t keyblock,
           char *reason_text = NULL;
           char *reason_comment = NULL;
           size_t reason_commentlen;
-          int reason_code;
+          int reason_code = 0;  /* init to silence cc warning.  */
 
 	  if (sig->sig_class == 0x20 || sig->sig_class == 0x28
 	      || sig->sig_class == 0x30)

tests/gpgscm/scheme.c

@@ -172,6 +172,7 @@ type_to_string (enum scheme_types typ)
      case T_FRAME: return "frame";
      }
      assert (! "not reached");
+     return "?";
 }
 
 /* ADJ is enough slack to align cells in a TYPE_BITS-bit boundary */