embryo_cc_sc2.c: prevent memory corruption.

Summary:
Modified code to following coverity result.
(overflow the memory access.)

@fix

Reviewers: raster, Hermet

Reviewed By: Hermet

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D1893

src/bin/embryo/embryo_cc_sc2.c

@@ -1106,7 +1106,7 @@ command(void)
 			    while ((*lptr <= ' ') && (*lptr != '\0'))
 			       lptr++;
 			    for (i = 0; 
-                                 (i < (int)(sizeof(name))) && 
+                                 (i < (int)(sizeof(name)) - 1) && 
                                  (sc_isalpha(*lptr));
 				 i++, lptr++)
 			       name[i] = *lptr;