Fix issue with assert macro not enclosing logical expressions.

Now all expressions in the assert macro are enclosed in parentheses, avoiding issues.

lib/pls/include/pls/internal/base/error_handling.h

@@ -12,6 +12,6 @@
  * (or its inclusion adds too much overhead).
  */
 #define PLS_ERROR(msg) printf("%s\n", msg); exit(1);
-#define PLS_ASSERT(cond, msg) if (!cond) { PLS_ERROR(msg) }
+#define PLS_ASSERT(cond, msg) if (!(cond)) { PLS_ERROR(msg) }
 
 #endif //PLS_ERROR_HANDLING_H