edsp: if internal is used, keep this decision

It wasn't noticeable before, but now with the (optional) logging it can
be observed that we decide in the internal path two times if an internal
or external solver should be used (and hence with logging, it is
attempted twice), so if we are in the internal path call the internal
resolver directly, which means those internal methods need to be public
– but we can hide them based on the symbol at least.

apt-pkg/algorithms.h

@@ -124,9 +124,6 @@ class pkgProblemResolver						/*{{{*/
    APT_HIDDEN void MakeScores();
    APT_HIDDEN bool DoUpgrade(pkgCache::PkgIterator Pkg);
 
-   APT_HIDDEN bool ResolveInternal(bool const BrokenFix = false);
-   APT_HIDDEN bool ResolveByKeepInternal();
-
    protected:
    bool InstOrNewPolicyBroken(pkgCache::PkgIterator Pkg);
 
@@ -138,9 +135,11 @@ class pkgProblemResolver						/*{{{*/
 
    // Try to intelligently resolve problems by installing and removing packages
    bool Resolve(bool BrokenFix = false, OpProgress * const Progress = NULL);
+   APT_HIDDEN bool ResolveInternal(bool const BrokenFix = false);
 
    // Try to resolve problems only by using keep
    bool ResolveByKeep(OpProgress * const Progress = NULL);
+   APT_HIDDEN bool ResolveByKeepInternal();
 
    APT_DEPRECATED_MSG("NOOP as MarkInstall enforces not overriding FromUser markings") void InstallProtect();
 

apt-pkg/upgrade.cc

@@ -115,7 +115,7 @@ static bool pkgDistUpgrade(pkgDepCache &Cache, OpProgress * const Progress)
       }
    }
 
-   bool const success = Fix.Resolve(false, Progress);
+   bool const success = Fix.ResolveInternal(false);
    if (Progress != NULL)
       Progress->Done();
    return success;
@@ -158,7 +158,7 @@ static bool pkgAllUpgradeNoNewPackages(pkgDepCache &Cache, OpProgress * const Pr
       Progress->Progress(50);
 
    // resolve remaining issues via keep
-   bool const success = Fix.ResolveByKeep(Progress);
+   bool const success = Fix.ResolveByKeepInternal();
    if (Progress != NULL)
       Progress->Done();
    return success;
@@ -218,7 +218,7 @@ static bool pkgAllUpgradeWithNewPackages(pkgDepCache &Cache, OpProgress * const
       Progress->Progress(60);
 
    // resolve remaining issues via keep
-   bool const success = Fix.ResolveByKeep(Progress);
+   bool const success = Fix.ResolveByKeepInternal();
    if (Progress != NULL)
       Progress->Done();
    return success;