winemono: double-quote variables

src/winetricks

@@ -14083,8 +14083,8 @@ load_winemono()
     regquery_dnbelow5=$? # 0 = found regkeys; 1 = no regkeys (or wine crashed while searching)
     ${WINE} reg query "HKCU\\Software\\Wine\\Mono" 1>/dev/null # check if a user created a custom wine-mono installation. This is not a default regkey when wine-mono is installed
     regquery_customwinemono=$? # 0 = found regkeys; 1 = no regkeys (or wine crashed while searching)
-    for winemono_msicaches in "${HOME}/.cache/wine/" "/usr/share/wine/mono/" "/opt/wine/mono/"; do
-        if winemono_cachedmsi=$(find ${winemono_msicaches} -iname 'wine-mono*.msi'); then
+    for winemono_cachedirs in "${HOME}/.cache/wine/" "/usr/share/wine/mono/" "/opt/wine/mono/"; do
+        if winemono_cachedmsi=$(find "${winemono_cachedirs}" -iname 'wine-mono*.msi'); then
             break
         fi
     done
@@ -14098,7 +14098,7 @@ load_winemono()
     fi
 
     # Auto-install any cached wine-mono*.msi files silenty, or use AHK to silently press "Wine Mono Installer" install button, or run "Wine Mono Installer" for user
-    if [ ${winemono_cachedmsi} ]; then
+    if [ "${winemono_cachedmsi}" ]; then
         w_try "${WINE}" control.exe appwiz.cpl install_mono # launch Wine Mono Installer
         # Note: Wine Mono Installer will auto-install a cached wine-mono*.msi if it is in any of these directories (ignores .tar.gz / .tar.xz files).
     elif [ ${W_OPT_UNATTENDED} ]; then