lib/helpers: _command_exists()

The weird subshell is weird AF. Just do a normal `if`.

Ditto `_binary_exists()`.

lib/helpers.bash

@@ -25,8 +25,14 @@ function _command_exists ()
   _param '2: (optional) log message to include when command not found'
   _example '$ _command_exists ls && echo exists'
   _group 'lib'
-  local msg="${2:-Command '$1' does not exist!}"
-  type "$1" &> /dev/null || (_log_warning "$msg" && return 1) ;
+  local msg="${2:-Command '$1' does not exist\!}"
+  if type "$1" &> /dev/null
+	then
+		return "$?"
+	else
+		_log_debug "$msg"
+		return 1
+	fi
 }
 
 function _binary_exists ()
@@ -36,8 +42,14 @@ function _binary_exists ()
   _param '2: (optional) log message to include when binary not found'
   _example '$ _binary_exists ls && echo exists'
   _group 'lib'
-  local msg="${2:-Binary '$1' does not exist!}"
-  type -P "$1" &> /dev/null || (_log_warning "$msg" && return 1) ;
+  local msg="${2:-Binary '$1' does not exist\!}"
+  if type -P "$1" &> /dev/null
+	then
+		return "$?"
+	else
+		_log_debug "$msg"
+		return 1
+	fi
 }
 
 function _completion_exists ()