audio/lmms: Fix build with gcc-5.2.0.

Signed-off-by: David Spencer <baildon.research@googlemail.com>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

audio/lmms/lmms.SlackBuild

@@ -54,8 +54,8 @@ find -L . \
 mkdir build
 cd build
   cmake \
-    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
-    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS -Wno-error" \
+    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS -Wno-error" \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DCMAKE_INSTALL_LIBDIR=lib${LIBDIRSUFFIX} \
     ..