[patch]: Fix memory leak of c-exp.y

[teawater <teawater@gmail.com>]

Sorry that the format of this patch is not very well. So I send it again.

c-exp.y has a memory leak in function parse_number. char *s is malloc
at line 1211.
There are returns at lines 1137, 1147, and 1157 without calling free.
This patch is for the GDB CVS version.

ChangeLog:
2008-06-21  Hui Zhu <teawater@gmail.com>
       * gdb/c-exp.y: Fix memory leak of function parse_number

--- a/gdb/c-exp.y
+++ b/gdb/c-exp.y
@@ -1134,6 +1134,7 @@ parse_number (p, len, parsed_float, puti
 	    = builtin_type (current_gdbarch)->builtin_decfloat;
 	  decimal_from_string (putithere->typed_val_decfloat.val, 4, p);
 	  p[len] = saved_char;
+	  free (s);
 	  return (DECFLOAT);
 	}

@@ -1144,6 +1145,7 @@ parse_number (p, len, parsed_float, puti
 	    = builtin_type (current_gdbarch)->builtin_decdouble;
 	  decimal_from_string (putithere->typed_val_decfloat.val, 8, p);
 	  p[len] = saved_char;
+	  free (s);
 	  return (DECFLOAT);
 	}

@@ -1154,6 +1156,7 @@ parse_number (p, len, parsed_float, puti
 	    = builtin_type (current_gdbarch)->builtin_declong;
 	  decimal_from_string (putithere->typed_val_decfloat.val, 16, p);
 	  p[len] = saved_char;
+	  free (s);
 	  return (DECFLOAT);
 	}