If using the default values, also set dwType to REG_SZ as our default
strings don't need to be expanded (found by Valgrind).

dlls/shell32/shellpath.c

diff --git a/dlls/shell32/shellpath.c b/dlls/shell32/shellpath.c
index b1e726c..c4e0507 100644
--- a/dlls/shell32/shellpath.c
+++ b/dlls/shell32/shellpath.c
@@ -1089,6 +1089,7 @@
 	        strcpy(szPath, "C:\\");	/* FIXME ??? */
 	        strcat(szPath, szDefaultPath);
 	      }
+              dwType=REG_SZ;
 	      RegSetValueExA(hKey,szValueName,0,REG_SZ,(LPBYTE)szPath,strlen(szPath)+1);
 	    }
 	  }
@@ -1125,6 +1126,7 @@
 	      strcpy(szPath, "C:\\");	/* FIXME ??? */
 	      strcat(szPath, szDefaultPath);
 	    }
+            dwType=REG_SZ;
 	    RegSetValueExA(hKey,szValueName,0,REG_SZ,(LPBYTE)szPath,strlen(szPath)+1);
 	  }
 	  RegCloseKey(hKey);