Core: tgaSave() should free memory passed in. SceneEditor: Add support for grid map dumping (in TGA format).

This allows reconstructing the map templates, which were never shipped with the game.
This patch also fixes insane memory leaking when taking screenshots, or dumping screen frames.

BBGE/Core.cpp

@@ -4777,6 +4777,7 @@ int Core::tgaSave(	const char	*filename,
 // open file and check for errors
 	file = fopen(adjustFilenameCase(filename).c_str(), "wb");
 	if (file == NULL) {
+		delete [] imageData;
 		return (int)false;
 	}
 
@@ -4802,6 +4803,7 @@ int Core::tgaSave(	const char	*filename,
 		|| fwrite(&cGarbage, sizeof(unsigned char), 1, file) != 1)
 	{
 		fclose(file);
+		delete [] imageData;
 		return (int)false;
 	}
 
@@ -4818,10 +4820,12 @@ int Core::tgaSave(	const char	*filename,
 			width * height * mode, file) != width * height * mode)
 	{
 		fclose(file);
+		delete [] imageData;
 		return (int)false;
 	}
 
 	fclose(file);
+	delete [] imageData;
 
 	return (int)true;
 }

BBGE/Core.h

@@ -1310,6 +1310,9 @@ public:
 	void pollEvents();
 
 	CoreSettings settings;
+
+	int tgaSave(const char *filename, short int width, short int height, unsigned char	pixelDepth, unsigned char	*imageData);
+
 protected:
 
 	std::string fpsDebugString;
@@ -1397,7 +1400,6 @@ protected:
 
 	
 	int tgaSaveSeries(char	*filename,  short int width, short int height, unsigned char pixelDepth, unsigned char *imageData);
-	int tgaSave(const char *filename, short int width, short int height, unsigned char	pixelDepth, unsigned char	*imageData);
 	virtual void onUpdate(float dt);
 	virtual void onRender(){}
 };