desktop/wmmon: Misc automated cleanups.

Signed-off-by: David Somero <xgizzmo@slackbuilds.org>

desktop/wmmon/wmmon.SlackBuild

@@ -6,13 +6,22 @@
 
 PRGNAM=wmmon
 VERSION=1.0b2_p14
-ARCH=${ARCH:-i486}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
 SRCVER=$(echo $VERSION | cut -d_ -f1)
 PATCHVER=$(echo $VERSION | cut -d_ -f2)
 
+# Automatically determine the architecture we're building on:
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+    # Unless $ARCH is already set, use uname -m for all other archs:
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
 CWD=$(pwd)
 TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM