Bug 1380984 - Fix a failure to detect that an install is registered as a possible default browser on Windows 7. r=agashlin

MozReview-Commit-ID: BnuvQTeBGFE

--HG--
extra : rebase_source : 39b445577d09e14d9600ec9ba2052c5ddd22bbaf

browser/installer/windows/nsis/shared.nsh

@@ -1616,11 +1616,11 @@ Function SetAsDefaultAppUser
     ${StrFilter} "${FileMainEXE}" "+" "" "" $R9
     ClearErrors
     ReadRegStr $0 HKCU "Software\Clients\StartMenuInternet\$R9\DefaultIcon" ""
-  ${EndIf}
-  ${If} ${Errors}
-  ${OrIf} ${AtMostWin2008R2}
-    ClearErrors
-    ReadRegStr $0 HKLM "Software\Clients\StartMenuInternet\$R9\DefaultIcon" ""
+    ${If} ${Errors}
+    ${OrIf} ${AtMostWin2008R2}
+      ClearErrors
+      ReadRegStr $0 HKLM "Software\Clients\StartMenuInternet\$R9\DefaultIcon" ""
+    ${EndIf}
   ${EndIf}
 
   ${Unless} ${Errors}