Modified MsdFile::ReadBuf() so that escaped characters are still skipped when bUnescape == false

As of this commit, this won't affect anything except CourseLoaderCRS, because everywhere else is passing `true` for the bUnescape parameter.

src/MsdFile.cpp

@@ -127,8 +127,24 @@ void MsdFile::ReadBuf( const char *buf, int len, bool bUnescape )
 
 		/* We've gone through all the control characters.  All that is left is either an escaped character, 
 		 * ie \#, \\, \:, etc., or a regular character. */
-		if( bUnescape && i < len && buf[i] == '\\' )
+		if(buf[i] == '\\' && i < len)
+		{
+			// If we're escaping the next character, skip the '\\'
+			if(bUnescape)
+			{
 				++i;
+			}
+			// Otherwise, add the '\\' to cProcessed here, so that
+			// whatever character is coming next stays escaped in
+			// the resulting value/parameter string 
+			// (and most importantly, it doesn't get parsed as a control character)
+			// on the next iteration
+			else 
+			{
+				cProcessed[iProcessedLen++] = buf[i++];	
+			}
+		}
+		
 		if( i < len )
 		{
 			cProcessed[iProcessedLen++] = buf[i++];