* configure.ac: when we use the packed attribute we really mean it so don't...

* configure.ac: when we use the packed attribute we really mean it so don't output useless compilation warnings.

configure.ac

@@ -910,7 +910,7 @@ if test "${ac_cv_c_ntohl_sys_param_h}" != "no"; then
 fi
 CFLAGS="${CFLAGS_save}"
 
-RDC_PROG_CC_WFLAGS([all extra no-unused-parameter sign-compare undef pointer-arith bad-function-cast cast-align write-strings old-style-definition missing-prototypes packed volatile-register-var])
+RDC_PROG_CC_WFLAGS([all extra no-unused-parameter sign-compare undef pointer-arith bad-function-cast cast-align write-strings old-style-definition missing-prototypes volatile-register-var])
 RDC_PROG_CC_FLAGS_IFELSE([-pipe])
 
 dnl This helps detect broken plugins with undefined symbols