Revert loplugin:unnecessaryparen warning around integer literals

...as those may be used to silence Clang -Werror,-Wunreachable-code (as happens
in sal/osl/unx/file_volume.cxx for Android, where OSL_detail_STATFS(...) always
expands to (1)).

Change-Id: I85d280c1315b4447362255d17f13f437d3c4af92

compilerplugins/clang/unnecessaryparen.cxx

@@ -149,9 +149,9 @@ bool UnnecessaryParen::VisitParenExpr(const ParenExpr* parenExpr)
                 << parenExpr->getSourceRange();
             handled_.insert(parenExpr);
         }
-    } else if (isa<IntegerLiteral>(subExpr) || isa<CharacterLiteral>(subExpr)
-               || isa<FloatingLiteral>(subExpr) || isa<ImaginaryLiteral>(subExpr)
-               || isa<CXXNullPtrLiteralExpr>(subExpr))
+    } else if (isa<CharacterLiteral>(subExpr) || isa<FloatingLiteral>(subExpr)
+               || isa<ImaginaryLiteral>(subExpr) || isa<CXXNullPtrLiteralExpr>(subExpr))
+        //TODO: isa<IntegerLiteral>(subExpr)
         //TODO: isa<CXXBoolLiteralExpr>(subExpr) || isa<ObjCBoolLiteralExpr>(subExpr)
     {
         auto const loc = subExpr->getLocStart();

sal/osl/unx/file_volume.cxx

@@ -216,7 +216,7 @@ static oslFileError osl_psz_getVolumeInformation (
     {
         OSL_detail_STATFS_STRUCT sfs;
         OSL_detail_STATFS_INIT(sfs);
-        if ((OSL_detail_STATFS(pszDirectory, &sfs)) < 0)
+        if ((OSL_detail_STATFS(pszDirectory, &sfs)) < (0))
         {
             oslFileError result = oslTranslateFileError(errno);
             return result;