tools: Remove unreachable break after return/break. Found by Smatch.

tools/winedump/msc.c

@@ -501,7 +501,6 @@ static void do_field(const unsigned char* start, const unsigned char* end)
         default:
             printf(">>> Unsupported field-id %x\n", fieldtype->generic.id);
             dump_data((const void*)fieldtype, 0x30, "\t");
-            return;
             break;
         }
     }

tools/winedump/msmangle.c

@@ -228,7 +228,6 @@ int symbol_demangle (parsed_symbol *sym)
     FREE_CT (ct);
     free (function_name);
     return 0;
-    break;
 
   case '6' : /* compiler generated static */
   case '7' : /* compiler generated static */
@@ -247,7 +246,6 @@ int symbol_demangle (parsed_symbol *sym)
     }
     free (function_name);
     return -1;
-    break;
 
   /* Functions */