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

identifier.

powerlevel9k.zsh-theme

@@ -159,6 +159,7 @@ left_prompt_segment() {
   local visual_identifier
   if [[ -n $5 ]]; then
     visual_identifier="$(print_icon $5)"
+    if [[ -n "$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
@@ -166,6 +167,7 @@ left_prompt_segment() {
       # 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"
   CURRENT_BG=$2
@@ -224,6 +226,7 @@ right_prompt_segment() {
   local visual_identifier
   if [[ -n $5 ]]; then
     visual_identifier="$(print_icon $5)"
+    if [[ -n "$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
@@ -231,6 +234,7 @@ right_prompt_segment() {
       # 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"
   CURRENT_RIGHT_BG=$2