Updated --free-version miner to v7 (monero-project/monero#3253).

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Signed-off-by: Carles Tubio <ctubio@users.noreply.github.com>

Makefile

@@ -2,7 +2,7 @@ K       ?= K.sh
 MAJOR    = 0
 MINOR    = 4
 PATCH    = 6
-BUILD    = 8
+BUILD    = 9
 CHOST   ?= $(shell $(MAKE) CHOST= chost -s)
 CARCH    = x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu x86_64-apple-darwin17 x86_64-w64-mingw32
 KLOCAL  := build-$(CHOST)/local

src/server/cf.h

@@ -225,7 +225,7 @@ namespace K {
         return FN::strU(argCurrency.substr(0, argCurrency.find("/")));
       };
       inline mCoinId quote() {
-        return FN::strU(argCurrency.substr(argCurrency.find("/")+1));
+        return FN::strU(argCurrency.substr(argCurrency.find("/") + 1));
       };
       inline int chambers() {
         if (argTestChamber == 1)