Standardize on int for line and column values

Recently tons of warnings show up for presumably "problematic"
singned <-> unsigned and size conversions.

The Qt side uses 'int', and that's the biggest 'integration surface'
for us, so instead of establishing some internal boundary between
signed and unsigned areas, push that boundary out of creator core code,
and use 'int' everywhere.

Because it reduces friction further, also do it in libcplusplus.

Change-Id: I84f3b79852c8029713e7ea6f133ffb9ef7030a70
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/libs/3rdparty/cplusplus/Names.h

@@ -88,8 +88,8 @@ public:
     virtual const Identifier *identifier() const;
 
     // ### find a better name
-    unsigned templateArgumentCount() const;
-    const FullySpecifiedType &templateArgumentAt(unsigned index) const;
+    int templateArgumentCount() const;
+    const FullySpecifiedType &templateArgumentAt(int index) const;
 
     virtual const TemplateNameId *asTemplateNameId() const
     { return this; }
@@ -224,8 +224,8 @@ public:
 
     virtual const Identifier *identifier() const;
 
-    unsigned nameCount() const;
-    const Name *nameAt(unsigned index) const;
+    int nameCount() const;
+    const Name *nameAt(int index) const;
     bool hasArguments() const;
 
     virtual const SelectorNameId *asSelectorNameId() const
@@ -248,10 +248,10 @@ private:
 class CPLUSPLUS_EXPORT AnonymousNameId: public Name
 {
 public:
-    AnonymousNameId(unsigned classTokenIndex);
+    AnonymousNameId(int classTokenIndex);
     virtual ~AnonymousNameId();
 
-    unsigned classTokenIndex() const;
+    int classTokenIndex() const;
 
     virtual const Identifier *identifier() const;
 
@@ -263,7 +263,7 @@ protected:
     virtual bool match0(const Name *otherName, Matcher *matcher) const;
 
 private:
-    unsigned _classTokenIndex;
+    int _classTokenIndex;
 };