Prevent textconv from being made when searching

As we're not actually interested in the diffs, this side-steps #130.

Author: tiennou

Classes/Controllers/PBHistorySearchController.m

@@ -405,7 +405,7 @@ - (void)startBackgroundSearch
 
 	results = nil;
 
-	NSMutableArray *searchArguments = [NSMutableArray arrayWithObjects:@"log", @"--pretty=format:%H", nil];
+	NSMutableArray *searchArguments = [NSMutableArray arrayWithObjects:@"log", @"--pretty=format:%H", @"--no-textconv", nil];
 	switch (self.searchMode) {
 		case PBHistorySearchModeRegex:
 			[searchArguments addObject:@"--pickaxe-regex"];