Change comment style and use errx instead of err

src/link/patch.c

@@ -85,14 +85,16 @@ static void pushRPN(int32_t value)
 		static const size_t increase_factor = 2;
 
 		if (stack.capacity > SIZE_MAX / increase_factor)
-			err(1, "Overflow in RPN stack resize");
+			errx(1, "Overflow in RPN stack resize");
 
 		stack.capacity *= increase_factor;
 		stack.buf =
 			realloc(stack.buf, sizeof(*stack.buf) * stack.capacity);
-		// || !stack.capacity to fix bogus
-		// zero-size allocation warning from
-		// scan-build, already caught above
+		/*
+		 * Static analysis tools complain that the capacity might become
+		 * zero due to overflow, but fail to realize that it's caught by
+		 * the overflow check above. Hence the stringent check below.
+		 */
 		if (!stack.buf || !stack.capacity)
 			err(1, "Failed to resize RPN stack");
 	}