Ascii: Fix bug where source is an image

neofetch

@@ -2011,11 +2011,18 @@ image_backend() {
 }
 
 get_ascii() {
-    if [[ ! -f "$image_source" || "$image_source" =~ (auto|ascii) ]]; then
+    if [[ ! -f "$image_source" ||
+          "$image_source" =~ (auto|ascii) ||
+          "$image_source" =~ \.(png|jpg|jpe|jpeg|gif) ]]; then
+
         # Fallback to distro ascii mode if custom ascii isn't found.
         [[ ! "$image_source" =~ (auto|ascii) ]] && \
             err "Ascii: Ascii file not found, using distro ascii."
 
+        # Fallback to distro ascii mode if source is an image.
+        [[ "$image_source" =~ \.(png|jpg|jpe|jpeg|gif) ]] && \
+            err "Image: Source is image file but ascii backend was selected. Using distro ascii."
+
         if [[ -d "/usr/share/neofetch/ascii/distro" ]]; then
             ascii_dir="/usr/share/neofetch/ascii/distro"