Use P<> and not <> when checking pointers

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6651 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/nsDialogs/nsDialogs.nsh

@@ -566,7 +566,7 @@ Header file for creating custom installer pages with nsDialogs
 
 !macro __NSD_FreeImage IMAGE
 
-	${If} ${IMAGE} <> 0
+	${If} ${IMAGE} P<> 0
 		System::Call gdi32::DeleteObject(ps) ${IMAGE}
 	${EndIf}
 

Include/Win/COM.nsh

@@ -10,7 +10,7 @@ COM defines and helper macros
 !include Win\COM.nsh
 !include Win\Propkey.nsh
 !insertmacro ComHlpr_CreateInProcInstance ${CLSID_ShellLink} ${IID_IShellLink} r0 ""
-${If} $0 <> 0
+${If} $0 P<> 0
 	${IShellLink::SetPath} $0 '("%COMSPEC%").r1'
 	${IShellLink::SetArguments} $0 '("/k echo HelloWorld").r2'
 	${If} $1 = 0
@@ -74,12 +74,12 @@ System::Call 'OLE32::CoCreateInstance(g "${clsid}",i 0,i ${CLSCTX_INPROC_SERVER}
 !macroend
 
 !macro ComHlpr_SafeRelease _p
-${If} ${_p} <> 0
+${If} ${_p} P<> 0
 	${IUnknown::Release} ${_p} ""
 ${EndIf}
 !macroend
 !macro ComHlpr_SafeReleaseAndNull _p
-${If} ${_p} <> 0
+${If} ${_p} P<> 0
 	${IUnknown::Release} ${_p} ""
 	StrCpy ${_p} 0
 ${EndIf}