dtmail: resolve 'deference before null check' errors related to if(!NULL) checks around free() calls

cde/programs/dtmail/libDtMail/Common/Session.C

@@ -1597,8 +1597,7 @@ DtMail::Session::targetTagName(char *special)
       NULL,
       &ret_codeset);
  
-   if (ret_locale)
-     free(ret_locale);
+   free(ret_locale);
    if (ret_lang)
      free(ret_lang);
    if (ret_target)

cde/programs/dtmail/libDtMail/RFC/MIMEBodyPart.C

@@ -382,8 +382,7 @@ MIMEBodyPart::getDtType(DtMailEnv & error)
       error.clear();
     if (type)
       DtDtsFreeDataType(type);
-    if (mime_type)
-      free(mime_type);
+    free(mime_type);
     if (name)
       free(name);
 }
@@ -510,7 +509,6 @@ MIMEBodyPart::loadBody(DtMailEnv & error)
 	  }
 	  }
 	}
-	if ( cs )
 	free ( cs );
 	if ( from_cs )
 	    free( from_cs );

cde/programs/dtmail/libDtMail/RFC/RFCMailBox.C

@@ -4963,7 +4963,7 @@ RFCMailBox::createMailRetrievalAgent(char *password)
 					appendCB, (void*) this);
 
         if (NULL != _mra_server) _mra_server->set_password(_mra_serverpw);
-        if (NULL != protocol) free(protocol);
+        free(protocol);
     }
     else if (True == DtMailServer::get_mailrc_value(
 					      _session, DTMAS_INBOX,

cde/programs/dtmail/libDtMail/RFC/RFCMailValues.C

@@ -170,8 +170,7 @@ decode1522(const char * enc_start, const char * max_end, char **output, DtMail::
 	free( from_cs );
     if (NULL != to_cs)
 	free ( to_cs );
-    if (NULL != cs_name)
-	free(cs_name);
+    free(cs_name);
 
     return(enc_end);
 }

cde/programs/dtmail/libDtMail/RFC/SunV3.C

@@ -375,14 +375,12 @@ SunV3::formatBodies(DtMailEnv & error,
 		delete [] cbuf;
 		delete rd;
 	    }
- 	    if (bp_contents) {
-		free(bp_contents);
-		bp_contents = NULL;
- 	    }
-	    if (name) {
-		free(name);
-		name = NULL;
-	    }
+
+	    free(bp_contents);
+	    bp_contents = NULL;
+	    
+	    free(name);
+	    name = NULL;
 	}
     }
 

cde/programs/dtmail/libDtMail/RFC/V3BodyPart.C

@@ -590,8 +590,7 @@ V3BodyPart::loadBody(DtMailEnv &)
 	   strcpy(cs, "DEFAULT");
 	   strcat(cs, ".");
 	   strcat(cs, ret);
-           if ( ret )
-	     free( ret );
+           free( ret );
 	}
 	}  // If cstmp is NULL