Fix incorrect string handling in pfJournalBook::IRenderPage()

Unify references to HTML string chunk as being accessed as wchar_t[]
strings rather than repeatedly calling std::wstring.c_str() on the
chunk, then using character positions obtained from those strings
to index directly into the std::wstring[] form from chunk->fText.

Sources/Plasma/FeatureLib/pfJournalBook/pfJournalBook.cpp

@@ -2668,10 +2668,14 @@ void	pfJournalBook::IRenderPage( UInt32 page, UInt32 whichDTMap, hsBool suppress
 					width = (UInt16)(512 - fPageLMargin - fPageRMargin);
 					height = (UInt16)(512 - fPageBMargin - y);
 					UInt32 lastChar;
-					dtMap->CalcWrappedStringSize( chunk->fText.c_str(), &width, &height, &lastChar, &ascent, &lastX, &lastY );
+					const wchar_t *fTextStr; // initialize later to avoid compile errors inside case block
+					int fTextStrLen;
+					fTextStr = chunk->fText.c_str();
+					fTextStrLen = chunk->fText.length();
+					dtMap->CalcWrappedStringSize( fTextStr, &width, &height, &lastChar, &ascent, &lastX, &lastY );
 					width = (UInt16)(512 - fPageLMargin - fPageRMargin);
 					if( !suppressRendering )
-						dtMap->DrawWrappedString( (UInt16)fPageLMargin, y, chunk->fText.c_str(), width, (UInt16)(512 - fPageBMargin - y), &lastX, &lastY );
+						dtMap->DrawWrappedString( (UInt16)fPageLMargin, y, fTextStr, width, (UInt16)(512 - fPageBMargin - y), &lastX, &lastY );
 
 					if( lastChar == 0 )
 					{
@@ -2682,17 +2686,16 @@ void	pfJournalBook::IRenderPage( UInt32 page, UInt32 whichDTMap, hsBool suppress
 							idx--;
 						break;
 					}
-					if( chunk->fText[ lastChar ] != 0 )
+					if( fTextStr[ lastChar ] != L'\0' )
 					{
 						// Didn't get to render the whole paragraph in this go, so we're going to cheat
 						// and split the paragraph up into two so that we can handle it properly. Note:
 						// this changes the chunk array beyond this point, so we need to invalidate the
 						// cache, but that's ok 'cause if we're doing this, it's probably invalid (or empty)
 						// anyway
-						int fTextLen = chunk->fText.length();
-						wchar_t *s = TRACKED_NEW wchar_t[fTextLen+1];
-						wcscpy(s,chunk->fText.c_str());
-						s[fTextLen] = L'\0';
+						wchar_t *s = TRACKED_NEW wchar_t[fTextStrLen+1];
+						wcscpy(s,fTextStr);
+						s[fTextStrLen] = L'\0';
 
 						// Note: Makes a copy of the string
 						pfEsHTMLChunk *c2 = TRACKED_NEW pfEsHTMLChunk( &s[ lastChar ] );