graphics/svgbob: Unbreak with Rust 1.37.0

error: trait objects without an explicit `dyn` are deprecated
   --> src/main.rs:163:47
    |
163 | fn build(args: &ArgMatches) -> Result<(), Box<Error>> {
    |                                               ^^^^^ help: use `dyn`: `dyn Error`
    |
note: lint level defined here
   --> src/main.rs:1:9
    |
1   | #![deny(warnings)]
    |         ^^^^^^^^
    = note: #[deny(bare_trait_objects)] implied by #[deny(warnings)]

error: trait objects without an explicit `dyn` are deprecated
   --> src/main.rs:224:68
    |
224 | fn convert_file(input: PathBuf, output: PathBuf) -> Result<(), Box<Error>> {
    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`

error: aborting due to 2 previous errors

Remove #![deny(warnings)] (basically the equivalent to -Werror in
C/C++) to fix the build with Rust 1.37.0 or greater.

1 files changed, 8 insertions, 3 deletions

diff --git a/graphics/svgbob/files/patch-src_main.rs b/graphics/svgbob/files/patch-src_main.rs
index 77b6de777d4e..9e48588b27aa 100644
--- a/graphics/svgbob/files/patch-src_main.rs
+++ b/graphics/svgbob/files/patch-src_main.rs
@@ -10,7 +10,12 @@ error: the item `exit` is imported redundantly
 
 --- src/main.rs.orig	2019-04-12 08:16:01 UTC
 +++ src/main.rs
-@@ -83,7 +83,6 @@ fn main() {
+@@ -1,4 +1,3 @@
+-#![deny(warnings)]
+ #[macro_use]
+ extern crate clap;
+ 
+@@ -83,7 +82,6 @@ fn main() {
                  }
                  Err(e) => {
                      use std::io::Write;
@@ -18,7 +23,7 @@ error: the item `exit` is imported redundantly
  
                      writeln!(
                          &mut std::io::stderr(),
-@@ -124,7 +123,6 @@ fn main() {
+@@ -124,7 +122,6 @@ fn main() {
      if let Some(file) = args.value_of("output") {
          if let Err(e) = svg::save(file, &svg) {
              use std::io::Write;
@@ -26,7 +31,7 @@ error: the item `exit` is imported redundantly
  
              writeln!(
                  &mut std::io::stderr(),
-@@ -148,7 +146,6 @@ where
+@@ -148,7 +145,6 @@ where
              Ok(a) => Some(a),
              Err(e) => {
                  use std::io::Write;