Print correct message when pclint not found

ament_pclint/ament_pclint/main.py

@@ -94,9 +94,14 @@ def main(argv=sys.argv[1:]):
         return 1
 
     additional_paths = None
-    pclint_bin = find_executable('pclp64', additional_paths=additional_paths)
+    exec_name = 'pclp64'
+    if sys.platform == 'linux':
+        exec_name += '_linux'
+    elif sys.platform == 'darwin':
+        exec_name += '_osx'
+    pclint_bin = find_executable(exec_name, additional_paths=additional_paths)
     if not pclint_bin:
-        print("Could not find pclint executable 'pclp64'", file=sys.stderr)
+        print("Could not find pclint executable '{}'".format(exec_name), file=sys.stderr)
         return 1
 
     # Prepare pclint command
@@ -223,10 +228,6 @@ def execute_analysis(cmd, result, retvals, idx):
 
 
 def find_executable(file_name, additional_paths=None):
-    if sys.platform == 'linux':
-        file_name += '_linux'
-    elif sys.platform == 'darwin':
-        file_name += '_osx'
     path = None
     if additional_paths:
         path = os.getenv('PATH', os.defpath)