winhelp: Fix a memory leak

[Andrew Talbot]

Changelog:
    winhelp: Fix a memory leak.

diff --git a/programs/winhelp/hlpfile.c b/programs/winhelp/hlpfile.c
index 8882a1a..3c34a06 100644
--- a/programs/winhelp/hlpfile.c
+++ b/programs/winhelp/hlpfile.c
@@ -860,7 +860,7 @@ static BOOL HLPFILE_AddParagraph(HLPFILE
     HLPFILE_PARAGRAPH *paragraph, **paragraphptr;
     UINT               textsize;
     BYTE              *format, *format_end;
-    char              *text, *text_end;
+    char              *text, *text_base, *text_end;
     long               size;
     unsigned short     bits;
     unsigned           nc, ncol = 1;
@@ -874,7 +874,7 @@ static BOOL HLPFILE_AddParagraph(HLPFILE
     if (buf + 0x19 > end) {WINE_WARN("header too small\n"); return FALSE;};
 
     size = GET_UINT(buf, 0x4);
-    text = HeapAlloc(GetProcessHeap(), 0, size);
+    text = text_base = HeapAlloc(GetProcessHeap(), 0, size);
     if (!text) return FALSE;
     if (hlpfile->hasPhrases)
     {
@@ -1164,8 +1164,7 @@ static BOOL HLPFILE_AddParagraph(HLPFILE
 	    }
 	}
     }
-    if (text_end != (char*)buf + GET_UINT(buf, 0x10) + size)
-        HeapFree(GetProcessHeap(), 0, text_end - size);
+    HeapFree(GetProcessHeap(), 0, text_base);
     return TRUE;
 }