Fix jaggl_pix cleanup if an error occurs

The previous pix_free label was in the wrong place, and the code
wouldn't break out of the loop.

gl-natives/src/main/c/jaggl.c

@@ -1220,10 +1220,10 @@ JNIEXPORT jboolean JNICALL Java_jaggl_context_choosePixelFormat1(JNIEnv *env, jc
 
 		result = JNI_TRUE;
 		goto dsi_free;
+	}
 
 pix_free:
 	CGLDestroyPixelFormat(jaggl_pix);
-	}
 #else
 #error Unsupported platform
 #endif