Don't boot/configure if we are validating --no-clean

validate

@@ -45,30 +45,30 @@ do
     shift
 done
 
+if [ "$CPUS" = "" ]; then
+    threads=2
+else
+    threads=`expr $CPUS + 1`
+fi
+
 if [ $testsuite_only -eq 0 ]; then
 
 if [ $no_clean -eq 0 ] && [ -f mk/config.mk ]; then
     make distclean
-fi
 
-case $OSTYPE in
-    cygwin|msys) config_args=--build=i386-unknown-mingw32
-        if [ -f c:/mingw/bin/gcc.exe ]
-        then
-            config_args="$config_args --with-gcc=c:/mingw/bin/gcc"
-        fi
-        ;;
-esac
+    case $OSTYPE in
+        cygwin|msys) config_args=--build=i386-unknown-mingw32
+            if [ -f c:/mingw/bin/gcc.exe ]
+            then
+                config_args="$config_args --with-gcc=c:/mingw/bin/gcc"
+            fi
+            ;;
+    esac
 
-if [ "$CPUS" = "" ]; then
-    threads=2
-else
-    threads=`expr $CPUS + 1`
+    sh boot
+    ./configure "--prefix=`pwd`/inst" $config_args
 fi
 
-sh boot
-./configure "--prefix=`pwd`/inst" $config_args
-
 thisdir=`utils/pwd/pwd forwardslash`
 
 make Validating=YES -j$threads ValidateHpc=$hpc ValidateSlow=$slow