rcpu: fix pvar to initialize empty variables (thanks mycroftiv)

rc/bin/rconnect

@@ -10,7 +10,8 @@ fn usage {
 
 fn pvar {
 	while(! ~ $#* 0){
-		~ $#$1 0 || path=/dev/null builtin whatis $1
+		~ $#$1 0 && echo $1'=()' ||
+			path=/dev/null builtin whatis $1
 		shift
 	}
 }

rc/bin/rcpu

@@ -76,7 +76,8 @@ while(~ $1 -*){
 
 fn pvar {
 	while(! ~ $#* 0){
-		~ $#$1 0 || path=/dev/null builtin whatis $1
+		~ $#$1 0 && echo $1'=()' ||
+			path=/dev/null builtin whatis $1
 		shift
 	}
 }

rc/bin/rexport

@@ -49,7 +49,8 @@ cmd=$*
 
 fn pvar {
 	while(! ~ $#* 0){
-		~ $#$1 0 || path=/dev/null builtin whatis $1
+		~ $#$1 0 && echo $1'=()' ||
+			path=/dev/null builtin whatis $1
 		shift
 	}
 }

rc/bin/rimport

@@ -44,7 +44,8 @@ case *; usage
 
 fn pvar {
 	while(! ~ $#* 0){
-		~ $#$1 0 || path=/dev/null builtin whatis $1
+		~ $#$1 0 && echo $1'=()' ||
+			path=/dev/null builtin whatis $1
 		shift
 	}
 }