default RM_R correctly in download-gamepacks.sh (as $RM usually is rm -f in make)

diff --git a/download-gamepacks.sh b/download-gamepacks.sh
index a12c6e7eff93bc384c5f93def8ac2a3d12c082fb..41af47c9fb28c1829455a12a8f99bd30359a2d15 100755 (executable)
--- a/download-gamepacks.sh
+++ b/download-gamepacks.sh
@@ -9,7 +9,7 @@
 : ${WGET:=wget}
 : ${ECHO:=echo}
 : ${MKDIR:=mkdir}
-: ${RM_R:=rm -r}
+: ${RM_R:=rm -f -r}
 : ${MV:=mv}
 : ${UNZIP:=unzip}