handle when crop values are all 0 and supmover minimally warning about cropping

lib/encode.sh

@@ -266,6 +266,9 @@ setup_pgs_mkv() {
                 right=${left}
                 bottom=${top}
             fi
+
+            # only crop if actually required
+            if [[ "${left}${top}${right}${bottom}" != "0000" ]]; then
                 # crop sup
                 (
                     set -x
@@ -277,7 +280,8 @@ setup_pgs_mkv() {
                 )
                 local cropRet=$?
                 # supmover does not error for out-of-bounds subtitles
-            if grep 'Window is outside new screen area' "${cropSup}.out"; then
+                # so error only when there is most certainly an issue
+                if [[ "$(grep -c 'Window is outside new screen area' "${cropSup}.out")" -gt 5 ]]; then
                     echo_fail "check ${cropSup}.out for complete logs"
                     cropRet=1
                 fi
@@ -289,6 +293,10 @@ setup_pgs_mkv() {
                 # create placeholder copy for replacement
                 cp "${ogSup}" "${cropSup}" || return 1
             fi
+        else
+            # create placeholder copy for replacement
+            cp "${ogSup}" "${cropSup}" || return 1
+        fi
 
         if ! replace_mkv_sup "${INPUT}" "${cropSup}" "${cropMkv}" "${stream}"; then
             echo_fail "could not replace mkv sup for ${stream}"