Only check for a user defined variable if we really have an visual

identifier.

powerlevel9k.zsh-theme

@@ -159,12 +159,14 @@ left_prompt_segment() {
   local visual_identifier
   if [[ -n $5 ]]; then
     visual_identifier="$(print_icon $5)"
-    # Allow users to overwrite the color for the visual identifier only.
-    local visual_identifier_color_variable=POWERLEVEL9K_${(U)1#prompt_}_VISUAL_IDENTIFIER_COLOR
-    set_default $visual_identifier_color_variable $3
-    visual_identifier="%F{${(P)visual_identifier_color_variable}%}$visual_identifier%f"
-    # Add an whitespace if we print more than just the visual identifier
-    [[ -n $4 ]] && visual_identifier="$visual_identifier "
+    if [[ -n "$visual_identifier" ]]; then
+      # Allow users to overwrite the color for the visual identifier only.
+      local visual_identifier_color_variable=POWERLEVEL9K_${(U)1#prompt_}_VISUAL_IDENTIFIER_COLOR
+      set_default $visual_identifier_color_variable $3
+      visual_identifier="%F{${(P)visual_identifier_color_variable}%}$visual_identifier%f"
+      # Add an whitespace if we print more than just the visual identifier
+      [[ -n $4 ]] && visual_identifier="$visual_identifier "
+    fi
   fi
 
   echo -n "$visual_identifier%{$fg%}$4$POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS"
@@ -224,12 +226,14 @@ right_prompt_segment() {
   local visual_identifier
   if [[ -n $5 ]]; then
     visual_identifier="$(print_icon $5)"
-    # Allow users to overwrite the color for the visual identifier only.
-    local visual_identifier_color_variable=POWERLEVEL9K_${(U)1#prompt_}_VISUAL_IDENTIFIER_COLOR
-    set_default $visual_identifier_color_variable $3
-    visual_identifier="%F{${(P)visual_identifier_color_variable}%}$visual_identifier%f"
-    # Add an whitespace if we print more than just the visual identifier
-    [[ -n $4 ]] && visual_identifier=" $visual_identifier"
+    if [[ -n "$visual_identifier" ]]; then
+      # Allow users to overwrite the color for the visual identifier only.
+      local visual_identifier_color_variable=POWERLEVEL9K_${(U)1#prompt_}_VISUAL_IDENTIFIER_COLOR
+      set_default $visual_identifier_color_variable $3
+      visual_identifier="%F{${(P)visual_identifier_color_variable}%}$visual_identifier%f"
+      # Add an whitespace if we print more than just the visual identifier
+      [[ -n $4 ]] && visual_identifier=" $visual_identifier"
+    fi
   fi
 
   echo -n "$4$visual_identifier$POWERLEVEL9K_WHITESPACE_BETWEEN_RIGHT_SEGMENTS%f"