make source-check without permanently changing WGET command
diff --git a/Makefile b/Makefile
index a4d09eb..53a6471 100644
--- a/Makefile
+++ b/Makefile
@@ -252,12 +252,8 @@
 
 source: $(TARGETS_SOURCE) $(HOST_SOURCE)
 
-.config.check: dependencies
-	$(SED) '/BR2_WGET/s/\"$$/ --spider\"/g' .config
-	touch $@
-
-_source-check: .config.check
-	$(MAKE) source
+_source-check: 
+	$(MAKE) SPIDER=--spider source
 
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