fix find error for bsd/mac os

imgult

@@ -71,11 +71,20 @@ fi
 du -hs "$@" > preImgultSize
 
 ## this is what we call leaning toothpick syndrome
-find "$@" -type f -a \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.jpe' \
-  -o -iname '*.jfif' -o -iname '*.jif' -o -iname '*.jfi' -o -iname '*.thm' \
-  -o -iname '*.png' -o -iname '*.apng' -o -iname '*.mng' -o -iname '*.gif' \
-  -o -iname '*.svg' -o -iname '*.svgz' \) \
-  > imgult-files.txt
+## bsd find needs a path to work, gnu find is smarter ...
+if [ -z "$@" ]; then
+  find . -type f -a \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.jpe' \
+    -o -iname '*.jfif' -o -iname '*.jif' -o -iname '*.jfi' -o -iname '*.thm' \
+    -o -iname '*.png' -o -iname '*.apng' -o -iname '*.mng' -o -iname '*.gif' \
+    -o -iname '*.svg' -o -iname '*.svgz' \) \
+      > imgult-files.txt
+else
+  find "$@" -type f -a \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.jpe' \
+    -o -iname '*.jfif' -o -iname '*.jif' -o -iname '*.jfi' -o -iname '*.thm' \
+    -o -iname '*.png' -o -iname '*.apng' -o -iname '*.mng' -o -iname '*.gif' \
+    -o -iname '*.svg' -o -iname '*.svgz' \) \
+      > imgult-files.txt
+fi
 
 ## back it up!
 if [ "$BACKUPIMAGES" = true ]; then