Update raygui to avoid warnings

examples/shaders/raygui.h

@@ -5079,25 +5079,18 @@ static const char **GetTextLines(const char *text, int *count)
     int textSize = (int)strlen(text);
 
     lines[0] = text;
-    int len = 0;
     *count = 1;
-    //int lineSize = 0;   // Stores current line size, not returned
 
     for (int i = 0, k = 0; (i < textSize) && (*count < RAYGUI_MAX_TEXT_LINES); i++)
     {
         if (text[i] == '\n')
         {
-            //lineSize = len;
             k++;
-            lines[k] = &text[i + 1];     // WARNING: next value is valid?
-            len = 0;
+            lines[k] = &text[i + 1]; // WARNING: next value is valid?
             *count += 1;
         }
-        else len++;
     }
 
-    //lines[*count - 1].size = len;
-
     return lines;
 }