Fix GCC 4.6 "set but not used" warnings

This was SVN commit r9194.

source/graphics/UnitManager.cpp

@@ -93,8 +93,6 @@ CUnit* CUnitManager::PickUnit(const CVector3D& origin, const CVector3D& dir) con
 {
 	// closest object found so far
 	CUnit* hit = 0;
-	// distance to closest object found so far
-	float dist = FLT_MAX;
 	// closest approach offset (easier to pick small stuff in forests than standard ScEd style selection)
 	float minrel = FLT_MAX;
 
@@ -115,7 +113,6 @@ CUnit* CUnitManager::PickUnit(const CVector3D& origin, const CVector3D& dir) con
 			float rel = offset.Length();
 			if (rel < minrel) {
 				hit = unit;
-				dist = tmin;
 				minrel = rel;
 			}
 		}

source/gui/CInput.cpp

@@ -1078,13 +1078,6 @@ void CInput::UpdateText(int from, int to_before, int to_after)
 
 	std::list<SRow>::iterator current_line;
 
-	// used to replace the last updated copy, because it might contain a "space"
-	//  in the end, which shouldn't be there because of word-wrapping. the only
-	//  way to know is to keep on going, but we don't want that, so we'll store
-	//  a copy.
-	SRow copy;
-	bool copy_used=false;
-
 	// Used to ... TODO
 	int check_point_row_start = -1;
 	int check_point_row_end = -1;
@@ -1394,14 +1387,10 @@ void CInput::UpdateText(int from, int to_before, int to_after)
 				//  in the coming erase.
 				current_line = destroy_row_to;
 
-				copy_used = true;
-
 				std::list<SRow>::iterator temp = destroy_row_to;
 
 				--temp;
 
-				copy = *temp;
-
 				m_CharacterPositions.erase(destroy_row_from, destroy_row_to);
 			}
 			// else, the for loop will end naturally.

source/ps/Parser.cpp

@@ -822,9 +822,6 @@ bool CParser::InputTaskType(const std::string& strName, const std::string& strSy
 	bool Extract = false;
 	bool Error = false;
 	size_t i;
-	bool ConstructNew = false;	// If it's the first input, then don't
-								//  construct a new node, because we
-								//  we already have m_BaseNode
 
 	// Construct base node
 	TaskType.m_BaseNode = new CParserTaskTypeNode();
@@ -899,8 +896,6 @@ next	[a]		Null	[a]		<-- added NewNode
 				// Set to current
 				CurNode = CurNode->m_AltNode;
 
-				ConstructNew = false;
-
 				// We're done extracting for now
 				continue;
 			}

source/scriptinterface/ScriptInterface.cpp

@@ -449,6 +449,7 @@ ScriptInterface_impl::ScriptInterface_impl(const char* nativeScopeName, const sh
 
 	m_glob = JS_NewGlobalObject(m_cx, &global_class);
 	ok = JS_InitStandardClasses(m_cx, m_glob);
+	debug_assert(ok);
 
 	JS_DefineProperty(m_cx, m_glob, "global", OBJECT_TO_JSVAL(m_glob), NULL, NULL, JSPROP_ENUMERATE | JSPROP_READONLY
 			| JSPROP_PERMANENT);