Add --no-patch to forcefully disable all patching.

docs/ssnes.1

@@ -198,6 +198,10 @@ Attempts to apply a IPS patch to the current ROM image. No files are altered.
 If this flag is not specified, SSNES will look for a .ips file with same basename as ROM specified.
 Note that SSNES cannot perform any error checking if patching was successful due to how IPS works.
 
+.TP
+\fB--no-patch\fR
+Disables all kinds of ROM patching.
+
 .TP
 \fB--xml MAP, -X MAP\fR
 Specifies path to XML memory map for the given ROM.

file.c

@@ -289,8 +289,11 @@ static ssize_t read_rom_file(FILE *file, void **buf)
       ret_buf = (uint8_t*)rom_buf;
    }
 
-   // Attempt to apply a patch.
-   patch_rom(&ret_buf, &ret);
+   if (!g_extern.block_patch)
+   {
+      // Attempt to apply a patch.
+      patch_rom(&ret_buf, &ret);
+   }
    
    // Remove copier header if present (512 first bytes).
    if ((ret & 0x7fff) == 512)

general.h

@@ -286,6 +286,7 @@ struct global
    char savestate_name[PATH_MAX];
    char xml_name[PATH_MAX];
 
+   bool block_patch;
    bool ups_pref;
    bool bps_pref;
    bool ips_pref;

ssnes.c

@@ -537,6 +537,7 @@ static void print_help(void)
    puts("\t-U/--ups: Specifies path for UPS patch that will be applied to ROM.");
    puts("\t--bps: Specifies path for BPS patch that will be applied to ROM.");
    puts("\t--ips: Specifies path for IPS patch that will be applied to ROM.");
+   puts("\t--no-patch: Disables all forms of rom patching.");
    puts("\t-X/--xml: Specifies path to XML memory map.");
    puts("\t-D/--detach: Detach SSNES from the running console. Not relevant for all platforms.\n");
 }
@@ -685,6 +686,7 @@ static void parse_input(int argc, char *argv[])
       { "ups", 1, NULL, 'U' },
       { "bps", 1, &val, 'B' },
       { "ips", 1, &val, 'I' },
+      { "no-patch", 0, &val, 'n' },
       { "xml", 1, NULL, 'X' },
       { "detach", 0, NULL, 'D' },
       { "features", 0, &val, 'f' },
@@ -916,6 +918,10 @@ static void parse_input(int argc, char *argv[])
                   g_extern.ips_pref = true;
                   break;
 
+               case 'n':
+                  g_extern.block_patch = true;
+                  break;
+
 #ifdef HAVE_FFMPEG
                case 's':
                {