ESP: Fix some unreachable code warnings

ESP: Fix some unreachable code warnings

Found with -Wunreachable-code clang compiler option.

The errors were:
./print-esp.c:263:3: warning: code will never be executed
                                                 [-Wunreachable-code]
                free(input_buffer);
                ^~~~
./print-esp.c:246:3: warning: code will never be executed
                                                 [-Wunreachable-code]
                EVP_CIPHER_CTX_free(ctx);
                ^~~~~~~~~~~~~~~~~~~
./print-esp.c:843:5: warning: code will never be executed
                                                 [-Wunreachable-code]
                                free(input_buffer);
                                ^~~~
./print-esp.c:826:5: warning: code will never be executed
                                                 [-Wunreachable-code]
                                EVP_CIPHER_CTX_free(ctx);
                                ^~~~~~~~~~~~~~~~~~~

(cherry picked from commit dcce77e91dec9758ad3d26365cd8a928004298d6)